Tea polyphenol component analysis device and method for tea powder

Abstract

The application discloses a device and method for analyzing tea polyphenol components in tea powder, and belongs to the technical field of detection equipment. The device comprises an instrument main body, a display panel and a plurality of sample chambers are arranged on the instrument main body, a mounting plate, the mounting plate comprises a circular shell with an opening facing upward, a square shell is further arranged on the outer circle of the circular shell and faces the opening direction, and a dissolving assembly is arranged on the instrument main body and used for dissolving a detection sample. A plurality of cuvettes are arranged in a circumferential array on the bottom surface of the circular shell, the inner cavity of the cuvette is in communication with the circular shell, and the smooth surface of the cuvette is installed towards the center of the circular shell. Through the application, the sample solvent can be quickly added to a plurality of cuvettes, so that the detection efficiency is improved, and there is no need to worry about liquid leakage or the cuvette from being tilted during the solvent adding process. After the adding is completed, the detection can be directly performed.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of tea polyphenol component analysis device and method in tea powder, belong to detection equipment technical field. BACKGROUND

[0002] Tea polyphenol is an important active ingredient in tea, also the main source of bitter taste and health function of tea. At present, the detection of tea polyphenol usually adopts spectrophotometry, by determining the light absorption of measured substance at a specific wavelength or within a certain wavelength range, thereby the qualitative and quantitative analysis of the substance is carried out. But the method usually determines the object as solution, so for the determination of tea powder, it needs to be dissolved in solvent before determination.

[0003] At present, when determining the content of tea polyphenol by spectrophotometry, the measured liquid needs to be manually injected into the quartz cuvette, and then the cuvette is placed into the detection device for detection. When detecting multiple samples, the cuvette needs to be taken out repeatedly for multiple liquid injection operations, which is low in efficiency. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a tea polyphenol component analysis device and method in tea powder, which solves the problem of low sample injection efficiency in the prior art.

[0005] The technical problem to be solved by the present application is solved by the following technical solution: a tea polyphenol component analysis device in tea powder, comprising an instrument main body, a display panel and a plurality of sample chambers are arranged on the instrument main body.

[0006] A mounting plate is arranged on the instrument main body, and the mounting plate comprises a circular shell with an opening facing upward, and a square shell is arranged outside the circular shell facing the opening direction.

[0007] A dissolving assembly is arranged on the instrument main body for dissolving the detection sample.

[0008] Among them, a plurality of cuvettes are arranged in circumferential array on the bottom surface of the circular shell, the inner cavity of the cuvette is in communication with the circular shell, and the smooth surface of the cuvette is installed towards the center of the circular shell.

[0009] By adopting the above technical solution, the sample solvent can be quickly added to multiple cuvettes, thereby improving the detection efficiency, and there is no need to worry about the leakage of solvent or the tilting of cuvette during the adding process. After the adding is completed, the detection can be directly carried out.

[0010] The present application is further provided: a circular groove is arranged on the instrument main body, a square groove is arranged outside the circular groove, the sample chamber is arranged in the circular groove, and when the mounting plate is installed, the circular shell and the square shell are respectively clamped into the circular groove and the square groove.

[0011] By adopting the technical scheme, the mounting plate can be stably clamped on the instrument main body, and stable detection can be ensured. The mounting plate can be accurately centrally positioned by clamping the circular groove and the circular shell, and the square groove and the square shell are clamped to limit the circumferential direction and prevent axial rotation. The circular shell is clamped in the circular groove, and the square shell is clamped in the square groove, and the two are matched to achieve double-degree-of-freedom limitation of the mounting plate, so that the cuvette can be accurately inserted into the predetermined position.

[0012] The application further provides that the square shell is provided with an outwardly opening groove at each corner, and the square groove is provided with an outwardly clamping block clamped with the groove.

[0013] By adopting the technical scheme, the mounting plate can be stably clamped on the instrument main body, and stable detection can be ensured. The mounting plate can be accurately centrally positioned by clamping the circular groove and the circular shell, and the square groove and the square shell are clamped to limit the circumferential direction and prevent axial rotation. The circular shell is clamped in the circular groove, and the square shell is clamped in the square groove, and the two are matched to achieve double-degree-of-freedom limitation of the mounting plate, so that the cuvette can be accurately inserted into the predetermined position.

[0014] The application further provides that the square shell is provided with an outwardly opening groove at each corner, and the square groove is provided with an outwardly clamping block clamped with the groove.

[0015] By adopting the technical scheme, the mounting plate can be stably clamped on the instrument main body, and stable detection can be ensured. The mounting plate can be accurately centrally positioned by clamping the circular groove and the circular shell, and the square groove and the square shell are clamped to limit the circumferential direction and prevent axial rotation. The circular shell is clamped in the circular groove, and the square shell is clamped in the square groove, and the two are matched to achieve double-degree-of-freedom limitation of the mounting plate, so that the cuvette can be accurately inserted into the predetermined position.

[0016] The application further provides that the square shell is provided with an outwardly opening groove at each corner, and the square groove is provided with an outwardly clamping block clamped with the groove.

[0017] By adopting the technical scheme, the mounting plate can be stably clamped on the instrument main body, and stable detection can be ensured. The mounting plate can be accurately centrally positioned by clamping the circular groove and the circular shell, and the square groove and the square shell are clamped to limit the circumferential direction and prevent axial rotation. The circular shell is clamped in the circular groove, and the square shell is clamped in the square groove, and the two are matched to achieve double-degree-of-freedom limitation of the mounting plate, so that the cuvette can be accurately inserted into the predetermined position.

[0018] The application further provides that the square shell is provided with an outwardly opening groove at each corner, and the square groove is provided with an outwardly clamping block clamped with the groove.

[0019] By adopting the technical scheme, the heating rod and the stirring rod can accelerate the dissolution rate of the tea powder and improve the production efficiency of the detection sample liquid. By integrally arranging the heating rod and the stirring rod in the dissolution assembly, the detection sample can be quickly prepared without additional tools for stirring or heating, and the detection efficiency can be improved.

[0020] The application further provides that the opening end of the dissolution shell is provided with an outwardly extending extension part, at least two opening grooves are arranged on the extension part, a clamping part is arranged on the end cover and clamped with the extension part, and when the end cover is mounted on the dissolution shell, the clamping part is rotated after penetrating through the opening grooves to abut against the bottom surface of the extension part.

[0021] By adopting the technical scheme, the end cover can be quickly mounted to prevent the end cover from falling off.

[0022] The application further provides that the bottom of the dissolution shell is provided with a hollow liquid discharge plate, one side of the liquid discharge plate is provided with a plurality of liquid discharge holes communicating with the inner cavity of the liquid discharge plate, and a liquid discharge pipe is further connected to the liquid discharge plate and penetrates through the bottom plate of the dissolution shell and is provided with a flow dividing element at the other end.

[0023] By adopting the technical scheme, the solution in the dissolution shell can be quickly discharged into the circular groove and then flow into the cuvette through the circular groove. Since the liquid discharge holes on the liquid discharge plate face downward, most of the undissolved impurities are precipitated on the upper part of the liquid discharge plate during the liquid discharge process, so that the entry of impurities during the discharge process is reduced and the purity of the detection sample is improved.

[0024] The application further provides that the flow dividing element comprises an arc-shaped plate, and the arc-shaped plate is provided with a liquid accumulation groove at the upper end, and the liquid accumulation groove is connected with the liquid discharge pipe at the upper end.

[0025] By adopting the technical scheme, the entire dissolution shell can be stably supported on the bottom surface through the arrangement of the arc-shaped plate, and the sample solution can be first accumulated in the liquid accumulation groove before flowing into the circular groove, so that the sample solution can be uniformly discharged to the four directions, the uniformity of the sample solution flowing out is improved, and the time required for each cuvette to accumulate the sample solution is relatively close.

[0026] The application also relates to a method for analyzing tea polyphenol components in tea powder, and specifically comprises the following steps:

[0027] Step 1: Put the tea powder into the inner cavity of the dissolution shell and add a solvent for dissolution, heat the solvent by the heating rod and stir the solvent by the stirring rod during the dissolution process, stir and dissolve for at least 300 seconds, and the highest liquid level of the solvent in the dissolution shell does not exceed two-thirds of the volume of the dissolution shell.

[0028] Step two: support the mounting plate on the instrument body through the support column, press the whole dissolution shell downward after abutting the shunt element at the bottom of the dissolution shell to the bottom surface of the circular groove, so that the drainage plate is separated from the bottom plate of the dissolution shell, the inner cavity of the drainage plate is communicated with the inner cavity of the dissolution shell, after the solvent for dissolving tea powder enters the inner cavity of the drainage plate, it enters the drainage pipe through the inner cavity of the drainage plate and is transported to the liquid accumulation groove, after the liquid accumulation groove is filled with solvent, it flows downward from the periphery and enters the cuvette;

[0029] Step three: observe the solvent collected in the cuvette, and stop pressing the dissolution shell when the solvent collected in the cuvette exceeds two-thirds of its volume, and the sample solution stops discharging;

[0030] Step four: after the dissolution shell is removed, the whole mounting plate is clamped in the circular groove and the square groove, and the cuvette at the bottom of the circular shell body accurately corresponds to each sample chamber and is inserted during clamping;

[0031] Step five: start the instrument body to detect the sample and obtain the detection result.

[0032] By adopting the above technical scheme, the detection of tea polyphenol content in tea powder can be quickly realized, the dissolution, liquid injection and detection of tea powder are integrated, the whole detection process is more simple and smooth, and the connection degree is higher. The dissolved tea powder can be injected and detected at one time, so that the detection efficiency is improved for a large number of detection projects.

[0033] The beneficial effects of the present application are:

[0034] By integrating a plurality of cuvettes on one mounting plate, synchronous liquid injection of the plurality of cuvettes can be realized, thereby providing a more efficient liquid injection mode for multi-sample detection. Through the setting of the dissolution assembly, the dissolution of tea powder can be quickly realized, and the setting of the mounting plate can realize rapid liquid injection. Multiple samples can be processed at one time, sample insertion into the sample chamber can be realized at one time, and each cuvette does not need to be operated individually, which is especially suitable for batch sample analysis and can significantly improve the detection efficiency.

[0035] By using a circular shell for liquid injection, the outer wall of the cuvette will not adhere to the sample solution during the injection process of the sample solution, and the cuvette can be directly inserted into the sample chamber for detection without wiping the cuvette, which reduces the difficulty of sample solution injection, especially when detecting some corrosive liquids. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0037] Figure 2Figure 6 is a schematic view of the installation plate of the present application after plugging;

[0038] Figure 3 Figure 7 is a schematic view of the installation plate and cuvette of the present application;

[0039] Figure 4 Figure 8 is a schematic view of the installation plate from the bottom direction of the present application;

[0040] Figure 5 Figure 9 is a schematic view of the dissolving assembly of the present application;

[0041] Figure 6 Figure 10 is a schematic view of the internal structure of the dissolving shell of the present application;

[0042] Figure 7 Figure 11 is a schematic view of the end cap of the present application;

[0043] Figure 8 Figure 12 is a schematic view of the internal structure of the dissolving shell during the liquid injection process of the present application;

[0044] Figure 9 Figure 13 is a schematic view of the installation plate of the present application; Figure 8 Figure 14 is an enlarged schematic view of the structure at A in Figure 13.

[0045] Figure 1 is a schematic view of the main body of the instrument; Figure 2 is a schematic view of the sample chamber; Figure 3 is a schematic view of the display panel; Figure 4 is a schematic view of the circular groove; Figure 5 is a schematic view of the square groove; Figure 6 is a schematic view of the outer clamping block; Figure 7 is a schematic view of the magnetic block two; Figure 8 is a schematic view of the buffer spring; Figure 9 is a schematic view of the installation plate; Figure 10 is a schematic view of the circular shell; Figure 11 is a schematic view of the square shell; Figure 12 is a schematic view of the cuvette; Figure 13 is a schematic view of the outer groove; Figure 14 is a schematic view of the magnetic block one; Figure 15 is a schematic view of the liquid injection port; Figure 16 is a schematic view of the dissolving assembly; Figure 17 is a schematic view of the dissolving shell; Figure 18 is a schematic view of the end cap; Figure 19 is a schematic view of the heating rod; Figure 20 is a schematic view of the stirring rod; Figure 21 is a schematic view of the outer extension; Figure 22 is a schematic view of the opening groove; Figure 23 is a schematic view of the clamping part; Figure 24 is a schematic view of the supporting column; Figure 25 is a schematic view of the clamping head; Figure 26 is a schematic view of the liquid discharge plate; Figure 27 is a schematic view of the liquid discharge pipe; Figure 28 is a schematic view of the arc-shaped plate; Figure 29 is a schematic view of the liquid accumulation groove; Figure 30 is a schematic view of the circular head; Figure 31 is a schematic view of the supporting rod; Figure 32 is a schematic view of the thrust spring; Figure 33 is a schematic view of the sealing ring; Figure 34 is a schematic view of the containing cavity; Figure 35 is a schematic view of the movable side cover; and Figure 36 is a schematic view of the triangular stopper. DETAILED DESCRIPTION

[0046] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific drawings.

[0047] As Figure 1As shown, a tea powder tea polyphenol component analysis device, comprising an instrument body 1, the instrument body 1 is provided with a display panel 102 and a plurality of sample chambers 101, wherein the display panel 102 is a touch screen human-computer interaction panel, through the display panel 102 can quickly select the project and detection method need to be detected. The instrument body 1 is also provided with a sample chamber 101 for inserting a colorimetric cup 203, the sample chamber 101 is arranged on the instrument body 1 in a circumferentially equidistant manner.

[0048] Further comprising a mounting plate 2, the mounting plate 2 includes a circular shell 201 with an opening facing upward and a square shell 202 arranged at the outer circle of the circular shell 201, the square shell 202 is integrally connected with the circular shell 201 to form the whole mounting plate 2. The bottom surface of the circular shell 201 is provided with a plurality of colorimetric cups 203 in the circumferential direction, the inner cavity of the colorimetric cup 203 is in communication with the circular shell 201, when injecting liquid, the sample solution first enters the circular shell 201 and then flows into the colorimetric cup 203. Among the four vertical sides of the colorimetric cup 203, there is a set of smooth surfaces and a set of frosted surfaces, wherein the smooth surface is used for reflecting the light source, and the smooth surface of the colorimetric cup 203 is installed towards the center of the circular shell 201.

[0049] Further comprising a dissolving assembly 3 arranged on the instrument body 1, the dissolving assembly 3 is used for dissolving the detection sample, in this embodiment, the detection sample dissolved by the dissolving assembly 3 is tea powder.

[0050] As shown in the figure, Figure 3 The middle part of the bottom plate of the circular shell 201 is upwardly convex, forming an inclined bottom surface with high middle and low periphery, the connection point of the colorimetric cup 203 and the circular shell 201 is the liquid injection port 206 of the colorimetric cup 203, and the liquid injection port 206 is at the lowest part of the bottom plate of the circular shell 201. During instrument detection, first, the tea powder is dissolved into the solvent through the dissolving assembly 3, and then the solvent dissolving the tea powder is injected into the circular shell 201, the solvent in the circular shell 201 flows to the low place due to gravity, and flows into the colorimetric cup 203 through the liquid injection port 206.

[0051] Further, a circular head 10 is arranged at the highest part of the middle part of the bottom plate of the circular shell 201, the operator can take the whole mounting plate 2 through the circular head 10, so as to conveniently insert the colorimetric cup 203 filled with sample solution into the sample chamber 101.

[0052] By the above-mentioned installation plate 2, the plurality of cuvettes 203 is integrated into one installation plate 2, which can realize the synchronous liquid injection of the plurality of cuvettes 203, improve the liquid injection efficiency of the cuvettes 203, and directly insert the plurality of cuvettes 203 into the sample chamber 101 for detection through the installation plate 2, without worrying about the liquid leakage during the liquid injection process. The cuvettes 203 can remain relatively stable during the liquid injection process, and the cuvettes 203 can be prevented from being poured.

[0053] As shown in Figure 1 , the instrument body 1 is provided with a circular groove 103, and a square groove 104 is arranged outside the circular groove 103. The sample chamber 101 is arranged in the circular groove 103, and the circular shell 201 and the square shell 202 are respectively clamped into the circular groove 103 and the square groove 104 when the installation plate 2 is installed. An outer groove 204 is arranged on the four corners of the square shell 202, and an outer clamping block 105 is arranged in the square groove 104 and clamped with the outer groove 204. The outer clamping block 105 and the bottom surface of the square groove 104 are provided with a buffer spring 107. When the cuvette 203 is installed, the cuvette 203 at the bottom of the installation plate 2 is aligned with each sample chamber 101, the circular shell 201 is clamped into the circular groove 103, and the square shell 202 is clamped into the square groove 104. The circular shell 201 can function as the axial positioning of the entire installation plate 2, and the square shell 202 can prevent the installation plate 2 from rotating at a large angle during insertion, thereby avoiding friction between the cuvette 203 and the sample chamber 101. When the installation plate 2 is inserted into the instrument body 1, the outer clamping block 105 at the end of the buffer spring 107 can be clamped into the outer groove 204 on the four corners of the square shell 202, which can not only function as positioning to enable the square shell 202 to be quickly aligned with the square groove 104 for insertion, but also prevent the installation plate 2 from colliding with the instrument body 1.

[0054] As shown in Figure 4 , a plurality of magnetic blocks one 205 are rotatably arranged on the bottom surface of the installation plate 2, and the magnetic poles of the single surface facing surfaces of the adjacent magnetic blocks one 205 are opposite. In this embodiment, the number of magnetic blocks one 205 is four, and each magnetic block one 205 is arranged in a fan shape on the bottom surface of the installation plate 2. The four magnetic blocks are spliced into a circle, and the magnetic poles of the magnetic pole surfaces of the adjacent magnetic blocks one 205 are opposite, that is, the N poles of two of the four magnetic blocks one 205 face outward, and the N poles of the other two magnetic blocks one 205 face the installation plate 2. Among them, the four magnetic blocks one 205 are fixed on the same insulating plate, and the connecting rod is fixedly connected with the circular head 10 after penetrating the bottom plate of the circular shell on the insulating plate.

[0055] As shown in Figure 1As shown, the middle of the circular groove 103 is provided with magnetic blocks two 106, and the single-face facing magnetic poles of adjacent magnetic blocks two 106 are opposite. The number and installation position of the magnetic blocks two 106 are the same as those of the magnetic blocks one 205, and the magnetic blocks two 106 are fixedly connected with the bottom surface of the circular groove 103.

[0056] Through the arrangement of the magnetic blocks one 205 and the magnetic blocks two 106, the installation plate 2 can be quickly installed and disassembled. When the installation plate 2 is installed, the magnetic blocks one 205 are controlled to rotate by the circular head 10, so that the magnetic poles of the magnetic blocks one 205 are rotated to mutually attract the magnetic poles of the magnetic blocks two 106, thereby realizing the longitudinal fixing and limiting of the installation plate 2. After the installation plate 2 is installed, a certain gap space is reserved between the magnetic blocks one 205 and the magnetic blocks two 106. When the installation plate 2 needs to be disassembled, the circular head 10 is rotated, so that the magnetic forces between the magnetic blocks one 205 and the magnetic blocks two 106 are mutually repulsive, and the installation plate 2 is pushed out of the circular groove 103 and the square groove 104 under the action of the buffer spring 107 and the repulsive force of the magnetic blocks one 205 and the magnetic blocks two 106. The arrangement of the gap space makes the magnetic blocks one 205 not contact the magnetic blocks two 106 when rotating, so that friction loss is not generated.

[0057] Through the arrangement of the magnetic blocks one 205 and the magnetic blocks two 106, the installation plate 2 can be quickly fixed after being inserted into the instrument main body 1, the installation and disassembly of the installation plate 2 in the experimental process are facilitated, the replacement of the cuvette 203 is quickly performed, and the detection efficiency of the entire detection process is improved.

[0058] Further, as shown in Figure 3 and Figure 4 , four support columns 4 are further arranged on the instrument main body 1, and the end portions of the support columns 4 are provided with clamping joints 5 which are clamped with the outer grooves 204. When the cuvette 203 is filled with liquid, the installation plate 2 is supported and fixed by the support columns 4. When the installation plate 2 is arranged on the support columns 4, the outer grooves 204 arranged on the four corners of the square shell 202 are downwardly arranged and clamped with the clamping joints 5 at the end portions of the support columns 4 to realize connection. Through the clamping of the support columns 4 and the outer grooves 204, the cuvette 203 arranged at the bottom of the installation plate 2 can be suspended, which can not only avoid the cuvette 203 from being bumped by the outside when being filled with liquid, but also facilitate the observation of the liquid level of the sample solution in the cuvette 203 by the experimental personnel.

[0059] As shown in Figure 5 and 7As shown, the dissolving assembly 3 comprises a dissolving shell 301, the upper end of the dissolving shell 301 is open and provided with an end cover 302, a heating rod 303 is arranged in the dissolving shell 301, and a stirring rod 304 is arranged on the end cover 302. The heating rod 303 and the stirring rod 304 can accelerate the dissolution rate of the tea powder and improve the preparation efficiency of the detection sample liquid. By integrating the heating rod 303 and the stirring rod 304 in the dissolving assembly 3, the detection efficiency can be improved without additional tools for stirring or heating.

[0060] In this embodiment, the heating rod 303 is fixedly arranged at the bottom of the dissolving shell 301, the heating end of the heating rod 303 extends upward and is arranged in the middle region of the dissolving shell 301, so that uniform heating can be performed on the dissolution in the dissolving shell 301. The stirring rod 304 is rotatably arranged in the middle of the end cover 302, the number of the stirring rod 304 is two, a driving motor is fixedly installed on the end cover 302, a connecting plate is fixedly connected to the rotating shaft of the driving motor, and the two stirring rods 304 are fixedly connected to the two ends of the connecting plate. The driving motor can drive the stirring rod 304 to quickly stir the solvent, and when the stirring rod 304 stirs the solvent, the heating rod 303 is located on the axis of rotation of the two stirring rods 304, so that interference between the stirring rod 304 and the heating rod 303 during stirring can be prevented.

[0061] As shown in Figure 6 The open end of the dissolving shell 301 is provided with an outward extension 305, at least two open grooves 306 are arranged on the outward extension 305, a clamping portion 307 is arranged on the end cover 302 and clamped with the outward extension 305, and when the end cover 302 is installed on the dissolving shell 301, the clamping portion 307 is rotated to make the clamping portion 307 abut against the bottom surface of the outward extension 305 after passing through the open groove 306. By arranging the outward extension 305 and the clamping portion 307, the end cover 302 can be quickly installed, and the end cover 302 can be prevented from falling off.

[0062] In this embodiment, the number of the clamping portion 307 and the open groove 306 is four, which are circumferentially and equidistantly arranged on the outer edge of the end cover 302 and the outward extension 305. When the end cover 302 is installed, the clamping portion 307 on the end cover 302 is only needed to be aligned with the open groove 306 arranged on the outward extension 305 and inserted, and after the clamping portion 307 is inserted to the bottom of the open groove 306, the entire end cover 302 is rotated, so that the clamping portion 307 is rotated and moves away from the open groove 306, and the quick installation of the end cover 302 is completed. At this time, the clamping portion 307 can be limited by the outward extension 305, and the end cover 302 is clamped on the dissolving shell 301. When the end cover 302 needs to be disassembled, the end cover 302 is rotated to make the clamping portion 307 repositioned corresponding to the open groove 306, and then the end cover 302 is pulled out, so that the clamping portion 307 can slide out of the open groove 306.

[0063] As shown in Figure 5 and Figure 6 , the bottom of the dissolving shell 301 is provided with an internally hollow liquid discharge plate 6, one side of the liquid discharge plate 6 towards the bottom surface of the dissolving shell 301 is provided with a plurality of liquid discharge holes, the liquid discharge holes communicate the dissolving shell 301 with the inner cavity of the liquid discharge plate 6, and the liquid discharge plate 6 is further connected with a liquid discharge pipe 7, the liquid discharge pipe 7 penetrates the bottom plate of the dissolving shell 301 and is provided with a shunt element at the other end.

[0064] Specifically, the liquid discharge plate 6 is annular as a whole, and the outer edges of the inner and outer circles of one side of the liquid discharge plate 6 that is attached to the dissolving shell 301 are provided with inclined attachment surfaces that are attached to the inner wall of the dissolving shell 301, so that the two can be attached more closely. The end of the liquid discharge pipe 7 is connected with the shunt element after penetrating the bottom plate of the dissolving shell 301, and a sealing ring 13 is arranged between the outer wall of the liquid discharge pipe 7 and the inner wall of the bottom plate of the dissolving shell 301, which can be used to prevent the sample solution from flowing out from the gap between the liquid discharge pipe 7 and the dissolving shell 301 during the liquid injection process.

[0065] As shown in Figure 8 , the arc-shaped plate 8 is an internally concave spherical plate that is recessed towards the dissolving shell 301, and the middle part of the arc-shaped plate 8 is provided with a through hole, and the bottom of the dissolving shell 301 is provided with a support rod 11 that extends downward into the through hole of the arc-shaped plate 8. Through the arrangement of the arc-shaped plate 8 and the support rod 11, the entire dissolving assembly 3 can be stably placed, and at the same time, due to the arrangement of the support rod 11, the dissolving shell 301 will not automatically descend under normal conditions, and the liquid discharge plate 6 is always attached to the bottom surface of the dissolving shell 301 when the dissolving shell 301 is placed on a flat surface, preventing the sample solution from leaking.

[0066] Further, a thrust spring 12 is arranged between the bottom plate of the dissolving shell 301 and the arc-shaped plate 8, and the thrust spring 12 is in a compressed state between the two, always applying a thrust force towards the two ends to the arc-shaped plate 8 and the dissolving shell 301.

[0067] As shown in Figure 9 , the sample solution in the dissolving shell 301 flows from the dissolving shell 301 to the liquid discharge plate 6 in the direction indicated by the arrow in the figure, accumulates in the liquid accumulation groove 9 after passing through the liquid discharge pipe 7, and flows out from the opening of the liquid accumulation groove 9 to the surrounding after the liquid accumulation groove 9 is filled with sample solution, and falls into the circular shell 201.

[0068] Further, as shown in Figure 3 , the middle part of the circular head 10 is further provided with a plug-in hole with a diameter larger than that of the support rod 11.

[0069] When the sample solution is injected into the cuvette 203 on the mounting plate 2 through the dissolving assembly 3, the tea powder is first dissolved in the dissolving shell 301 to form a sample solution, and the mounting plate 2 is fixed on the support rod 11. The dissolving assembly 3 containing the sample solution is taken, the support rod 11 at the bottom of the dissolving shell 301 is inserted into the insertion hole in the middle of the circular head 10, the bottom surface of the arc-shaped plate 8 abuts against the circular head 10, at this time the entire dissolving shell 301 is pressed, the thrust spring 12 is compressed, the bottom plate of the dissolving shell 301 is separated from the drainage plate 6, the sample solution in the dissolving shell 301 flows into the gap between the bottom plate and the drainage plate 6, and due to the water pressure, the sample solution flows into the inner cavity of the drainage plate 6 through the drainage holes on the drainage plate 6, and then flows into the liquid accumulation groove 9 through the guide of the drainage pipe 7. The sample solution in the liquid accumulation groove 9 flows out and falls on the arc-shaped plate 8, and then flows to the periphery under the guidance of the arc-shaped plate 8. The arrangement of the arc-shaped plate 8 can prevent the sample solution from dropping on the circular head 10 when the sample solution is injected, so that the subsequent experimenter can conveniently transfer the mounting plate 2 and the cuvette 203 on the mounting plate 2 to the sample chamber 101 by holding the circular head 10.

[0070] In another embodiment, when the sample solution does not need to control the internal impurities, the drainage plate 6 can be repeatedly pressed to rise and fall in the dissolving shell 301, so as to form a suction effect and accelerate the flow of the sample solution into the drainage plate 6.

[0071] As shown in Figure 1 , a containing cavity 14 for accommodating the dissolving assembly 3 is arranged on the side of the instrument main body 1, the containing cavity 14 is open to the outside and is provided with a movable side cover 15, the lower side of the movable side cover 15 is pivotally connected to the lower side of the opening of the containing cavity 14, and a triangular stop block 16 is further arranged at the pivot connection. In this embodiment, the cross section of the triangular stop block 16 is a right triangle, one of the right angles of which is attached to the outer surface of the movable side cover 15, and the other right angle can be attached to the surface of the instrument main body 1 when the movable side cover is opened, so as to support the entire movable side cover and form a suspended support as shown in Figure 1 and Figure 2 . Through the arrangement of the containing cavity 14 and the movable side cover, the dissolving assembly 3 can be conveniently stored when not in use, and placed on the movable side cover after use, so as to facilitate subsequent continuous taking.

[0072] The application also relates to a tea polyphenol component analysis method for tea powder, which specifically comprises the following steps:

[0073] Step one: Put tea powder into the inner cavity of the dissolving shell 301, and add solvent for dissolution. During the dissolution process, the solvent is heated by the heating rod 303 and stirred by the stirring rod 304. The stirring and dissolution process lasts at least 300 seconds, and the highest liquid level of the solvent in the dissolving shell 301 does not exceed two-thirds of the volume of the dissolving shell 301. Specifically, during the dissolution of the tea powder, after the heating rod 303 heats the solution in the middle region of the dissolving shell 301, the solution in the middle region can be quickly stirred to other regions due to the action of the stirring rod 304, thereby improving the uniformity of the heat of the overall sample solution, increasing the heating speed, and promoting the dissolution of the tea powder.

[0074] Step two: Support the mounting plate 2 on the instrument body 1 by the support column 4. After the shunt element at the bottom of the dissolving shell 301 is abutted to the bottom surface of the circular groove 103, press the entire dissolving shell 301 downward so that the drainage plate 6 is separated from the bottom plate of the dissolving shell 301, and the inner cavity of the drainage plate 6 is in communication with the inner cavity of the dissolving shell 301. After the solvent for dissolving tea powder enters the inner cavity of the drainage plate 6, it enters the drainage pipe 7 through the inner cavity of the drainage plate 6 and is transported to the liquid accumulation groove 9. After the liquid accumulation groove 9 is filled with solvent, it flows downward from all around and enters the cuvette 203.

[0075] Step three: Observe the solvent collected in the cuvette 203. When the solvent collected in the cuvette 203 exceeds two-thirds of its volume, stop pressing the dissolving shell 301, and the sample solution stops flowing out. In the specific operation process, press the end cover 302 of the dissolving shell 301 to separate the drainage plate 6 from the bottom surface of the dissolving shell 301, and the sample solution flows out of the dissolving shell 301. At the same time, when adding the sample solution, the liquid level in the cuvette 203 is observed in real time. When the liquid level exceeds one-half of the dissolving capacity of the cuvette 203, release the end cover 302 of the dissolving shell 301 so that the drainage plate 6 reattaches to the bottom surface of the dissolving shell 301. After the drainage holes on the drainage plate 6 are closed, the sample solution stops flowing out. At this time, the residual sample solution in the drainage pipe 7 continues to flow outward and is supplemented into the cuvette 203, so that the sample solution in the cuvette 203 reaches two-thirds of its volume. If two-thirds of the volume is not reached, press the end cover 302 of the dissolving shell 301 again and immediately release it, so that a small amount of sample solution flows out and is continuously supplemented into the cuvette 203. Repeat the above operation until the sample solution in the cuvette 203 reaches the predetermined value.

[0076] Step four: After the dissolving shell 301 is removed, the entire mounting plate 2 is clamped in the circular groove 103 and the square groove 104, and the cuvette 203 at the bottom of the mounting plate 2 accurately corresponds to each sample chamber 101 and is inserted. Before the dissolving shell 301 is removed, the residual sample solution in the liquid accumulation groove 9 needs to be removed by paper or cloth with adsorption or other suction devices to prevent overflow on the workbench due to shaking or tilting.

[0077] Step five: start the instrument main body 1 to detect the sample, and obtain the detection result.

[0078] Working principle:

[0079] The whole detection process includes dissolution of tea powder, liquid injection and detection.

[0080] The dissolution of tea powder is carried out by stirring and heating at the same time. The dissolution assembly 3 is taken out of the containing cavity 14 and placed on the movable side plate. Tea powder and solvent are added into the dissolution shell 301. The stirring rod 304 is used for stirring and the heating rod 303 is used for heating to promote dissolution. After dissolution, the dissolution assembly 3 needs to be static for at least ten minutes, so that the insoluble impurities in the sample solution are precipitated to the bottom of the liquid discharge plate 6, and the sample solution is cooled at the same time.

[0081] The mounting plate 2 is fixed and supported by the support column 4, and the cuvette 203 is suspended. The dissolution assembly 3 is transferred to above the mounting plate 2 by holding the end cover 302. The support rod 11 is inserted into the insertion hole on the circular head 10. The end cover 302 is pressed, so that the push spring 12 is compressed. The liquid discharge plate 6 is separated from the bottom plate of the dissolution shell 301. The sample solution in the dissolution shell 301 flows into the gap between the liquid discharge plate 6 and the bottom surface of the dissolution shell 301 and enters the inner cavity of the liquid discharge plate 6 through the liquid discharge hole. Then the solution continues to flow through the liquid discharge pipe 7 to the liquid accumulation groove 9. When the solution in the liquid accumulation groove 9 is full, it flows out to the surrounding area. Under the guidance of the arc-shaped plate 8, the solution forms a flow mode similar to the umbrella surface of a rain umbrella and flows out to the surrounding area. Then the solution falls into the circular shell 201 and flows into the cuvette 203 through the guidance of the bottom surface of the circular shell 201. The liquid injection is completed.

[0082] The mounting plate 2 is transferred to the instrument main body 1 by holding the circular head 10. Each cuvette 203 is inserted into the opening of the sample chamber 101 by aligning it. The circular shell 201 is clamped with the circular groove 103, the square shell 202 is clamped with the square groove 104, and the magnetic block one 205 and the magnetic block two 106 are attracted to each other by rotating the circular head 10. Thus, the mounting plate 2 is stably fixed in the instrument main body 1. Finally, the instrument main body 1 is started to detect the sample solution in the cuvette 203.

[0083] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and various changes and improvements can be made without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for analyzing tea polyphenols in tea powder, characterized in that, include: The instrument body (1) is provided with a display panel (102) and several sample chambers (101). Mounting plate (2), the mounting plate (2) includes a circular shell (201) with the opening facing upward, and a square shell (202) is also provided on the outer ring of the circular shell (201) facing the opening direction. The dissolution component (3) is disposed on the instrument body (1) and is used to dissolve the test sample; Among them, a plurality of cuvettes (203) are arranged in a circular array on the bottom surface of the circular shell (201). The inner cavity of the cuvettes (203) is connected to the circular shell (201), and the smooth surface of the cuvettes (203) is installed facing the center of the circular shell (201). Multiple cuvettes (203) are integrated onto a single mounting plate (2); The instrument body (1) is provided with a circular groove (103), and a square groove (104) is provided on the outer ring of the circular groove (103). The sample chamber (101) is located in the circular groove (103). When the mounting plate (2) is installed, the circular shell (201) and the square shell (202) are respectively inserted into the circular groove (103) and the square groove (104). The dissolving component (3) includes a dissolving shell (301), which has an opening at the upper end and is provided with an end cap (302). The bottom of the dissolution shell (301) is provided with a hollow drain plate (6). The side of the drain plate (6) facing the dissolution shell (301) is provided with a plurality of drain holes communicating with the inner cavity of the drain plate (6). The drain plate (6) is also connected to a drain pipe (7). The drain pipe (7) passes through the bottom plate of the dissolution shell (301) and has a diversion element at the other end. The diversion element includes an arc plate (8), and a liquid accumulation tank (9) is provided at the upper end of the arc plate (8). The upper end of the liquid accumulation tank (9) is connected to the drain pipe (7). A circular head (10) is also provided at the highest point in the middle of the bottom plate of the circular shell (201). Four support columns (4) are also provided on the instrument body (1). When the cuvette (203) is injected with liquid, the mounting plate (2) is supported and fixed by the support columns (4). A through hole is provided in the middle of the arc plate (8), and a support rod (11) is provided at the bottom of the melting shell (301). The support rod (11) extends downward into the through hole of the arc plate (8). A thrust spring (12) is provided between the bottom plate of the melting shell (301) and the arc plate (8); A insertion hole with a diameter larger than that of the support rod (11) is also provided in the middle of the circular head (10).

2. The device for analyzing tea polyphenols in tea powder according to claim 1, characterized in that: The square shell (202) has an outer groove (204) with the opening facing downward at the four corners. An outer locking block (105) is provided in the square groove (104) and engages with the outer groove (204). A buffer spring (107) is provided between the outer locking block (105) and the bottom surface of the square groove (104).

3. The device for analyzing tea polyphenols in tea powder according to claim 1, characterized in that: A plurality of magnetic blocks (205) are rotatably arranged on the bottom surface of the mounting plate (2), and the magnetic poles of adjacent magnetic blocks (205) are opposite in one direction. A magnetic block (106) is arranged in the middle of the circular groove (103), and the magnetic poles of adjacent magnetic blocks (106) are opposite in one direction.

4. The device for analyzing tea polyphenols in tea powder according to claim 2, characterized in that: The end of the support column (4) is provided with a snap-fit ​​connector (5) that engages with the outer groove (204).

5. The apparatus for analyzing tea polyphenols in tea powder according to claim 1, characterized in that: A heating rod (303) is provided inside the melting shell (301), and a stirring rod (304) is provided on the end cap (302).

6. The apparatus for analyzing tea polyphenols in tea powder according to claim 5, characterized in that: The dissolution shell (301) has an outwardly extending extension (305) at its open end. The extension (305) has at least two opening slots (306). The end cap (302) has a snap-fit ​​part (307) that snaps into the extension (305). When the end cap (302) is installed on the dissolution shell (301), the snap-fit ​​part (307) passes through the opening slots (306) and the end cap (302) is rotated so that the snap-fit ​​part (307) abuts against the bottom surface of the extension (305).

7. A method for analyzing tea polyphenols in tea powder, specifically employing the analytical apparatus described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Put the tea powder into the inner cavity of the dissolving shell (301) and add solvent to dissolve it. During the dissolving process, the solvent is heated by the heating rod (303) and stirred by the stirring rod (304). Stirring and dissolving for at least 300 seconds, and the highest liquid level of the solvent in the dissolving shell (301) does not exceed two-thirds of the volume of the dissolving shell (301). Step 2: Support the mounting plate (2) on the instrument body (1) with the support column (4). After the diversion element at the bottom of the dissolving shell (301) is brought into contact with the bottom surface of the circular groove (103), press down the entire dissolving shell (301) so that the drain plate (6) is separated from the bottom plate of the dissolving shell (301). The inner cavity of the drain plate (6) is connected to the inner cavity of the dissolving shell (301). The solvent for dissolving tea powder enters the inner cavity of the drain plate (6), enters the drain pipe (7) through the inner cavity of the drain plate (6), and is transported to the liquid accumulation tank (9). After the liquid accumulation tank (9) is full of solvent, it flows down from all sides and enters the cuvette (203). Step 3: Observe the solvent collected in the cuvette (203). When the solvent collected in the cuvette (203) exceeds two-thirds of its volume, stop pressing the dissolution shell (301) and the sample solution will stop being discharged. Step 4: After removing the dissolution shell (301), snap the entire mounting plate (2) into the circular groove (103) and the square groove (104). During the snapping process, the cuvette (203) at the bottom of the circular shell (201) accurately corresponds to each sample chamber (101) and is inserted. Step 5: Start the instrument (1) to test the sample and obtain the test results.

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