Pretreatment device for measuring content of carbonyl compound in methanol

Abstract

The utility model provides a pretreatment device for measuring the content of carbonyl compounds in methanol, which comprises a shell, a capping device, a liquid conveying device, a liquid adding device and a turntable oscillating device. According to the device, independent cap removing and cap covering operations can be carried out on the volumetric flasks through mutual cooperation of the cap covering device and the rotating disc oscillation device, more importantly, through mutual cooperation of the devices, the pretreatment process of the methanol solution containing the carbonyl compounds can be fully automatically completed under unified regulation and control of the control assembly, and convenience is provided for subsequent determination. Compared with the prior art, the device can realize whole-course automation, does not need manual intervention, is high in precision, safe and reliable, and can meet the requirements of the modern industry on precision and efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical analysis equipment field, concretely is a kind of automatic pretreatment device for determining carbonyl compound content in methanol. BACKGROUND

[0002] Carbonyl compounds, such as aldehydes and ketones, have important applications in various fields such as chemical industry, food, medicine, and environmental monitoring. Accurate determination of the content of these compounds in different samples is crucial for product quality control, process optimization, environmental monitoring, and health risk assessment. However, traditional methods for determining the content of carbonyl compounds mainly rely on manual operation, which is tedious, inefficient, and prone to errors. Existing equipment still requires manual intervention in sample processing, reagent addition, and reaction control, and cannot achieve full automation, making it difficult to meet the requirements of modern industry for precision and efficiency. Therefore, in view of the above problems, the utility model aims to provide an automatic, high-precision, safe and reliable carbonyl compound content determination pretreatment device to solve the problems in the prior art and meet the needs of modern industry for carbonyl compound content determination pretreatment. SUMMARY

[0003] The utility model is to solve the above-mentioned problems existing in prior art, provide a kind of pretreatment device for determining carbonyl compound content in methanol, it include: cabinet, cover adding device, liquid delivery device, liquid adding device, carousel oscillation device, wherein cover adding device includes: cover sliding table, distance photoelectric sensor, electromagnet, electromagnet frame, iron cover;Liquid delivery device includes: three sample liquid pipes, sample liquid adding pipe, sample liquid injection pump, 2,4-dinitrophenylhydrazine solution pipe, 2,4-dinitrophenylhydrazine solution adding pipe, 2,4-dinitrophenylhydrazine solution injection pump, potassium hydroxide-methanol solution pipe, potassium hydroxide-methanol solution adding pipe, potassium hydroxide-methanol solution injection pump, mixed liquid pipe, mixed liquid injection pump and three mixed liquid pipes and a displacement pipe;Liquid adding device includes: liquid adding sliding table and pipeline fixing clamp;Carousel oscillation device includes: motor and carousel.

[0004] The pipeline fixing clamp is installed and fixed on the liquid adding sliding table. The pipeline fixing clamp can clamp and fix the sample liquid adding pipe, 2,4-dinitrophenylhydrazine solution adding pipe, potassium hydroxide-methanol solution adding pipe and mixed liquid pumping pipe respectively, and can realize reciprocating linear motion by using the liquid adding sliding table. One end of the sample liquid adding pipe, 2,4-dinitrophenylhydrazine solution adding pipe and potassium hydroxide-methanol solution adding pipe is selected to pass through the pipeline fixing clamp and is clamped and fixed after a certain length is selected, so that the sample liquid adding pipe, 2,4-dinitrophenylhydrazine solution adding pipe and potassium hydroxide-methanol solution adding pipe cannot be adhered to the reagent in the volumetric flask when the reagent is added into the volumetric flask, and an error is caused. The pipeline fixing clamp adopts a fastening clamping structure, so that the liquid pipes can not be loosened and fallen off during movement, liquid adding and liquid pumping, and the operation stability is ensured. The other end of the sample liquid adding pipe is connected with a sample liquid injection pump P end, the other end of the 2,4-dinitrophenylhydrazine solution adding pipe is connected with a 2,4-dinitrophenylhydrazine solution injection pump P end, the other end of the potassium hydroxide-methanol solution adding pipe is connected with a potassium hydroxide-methanol solution injection pump P end, and the other end of the mixed liquid pumping pipe is connected with a mixed liquid injection pump P end.

[0005] Further, one end of each of the three sample liquid pumping pipes is connected with a sample liquid injection pump T end, A end and B end respectively, and the other end is connected with three sample bottles respectively. One end of the 2,4-dinitrophenylhydrazine solution pumping pipe is connected with a 2,4-dinitrophenylhydrazine solution injection pump T end, and the other end is connected with a 2,4-dinitrophenylhydrazine solution bottle. One end of the potassium hydroxide-methanol solution pumping pipe is connected with a potassium hydroxide-methanol solution injection pump T end, and the other end is connected with a potassium hydroxide-methanol solution bottle. One end of each of the three mixed liquid adding pipes is connected with a mixed liquid injection pump X end, Y end and A end respectively, and the other end is inserted into three cuvettes respectively. One end of the displacement pipe is connected with a mixed liquid injection pump T end, and the other end is inserted into a displacement cup. Through cooperation of the multi-channel injection pump and the corresponding pipeline, the metering and transfer of each sample or reagent are realized.

[0006] Further, the electromagnet and the distance photoelectric sensor are installed on the electromagnet frame. The electromagnet frame is installed on the capping sliding table and can realize reciprocating linear motion by using the capping sliding table. The iron cover main body is made of nylon material and is embedded with an iron disc with a thickness of 3 mm at the upper end. When the electromagnet is powered on, the iron cover can be tightly adsorbed to the electromagnet. When the electromagnet is powered off, the adsorbed iron cover is released, and the capping and uncapping operations of the sample volumetric flask are completed. The liquid adding sliding table and the capping sliding table are both provided with linear driving components, so that precise positioning and reciprocating linear motion can be realized, and the operation precision of the device is improved.

[0007] Further, the rotating disc is connected with the motor shaft through a shaft key, and the rotating disc can be rotated clockwise, counterclockwise or alternately clockwise and counterclockwise by using the motor; the motor is matched with a control component, the rotating speed and direction of the rotating disc can be adjusted, and the oscillation mixing requirements of different samples can be met; a plurality of sample liquid containers can be placed on the rotating disc, and the plurality of samples can be processed simultaneously, so that the efficiency is improved; the device is further provided with a control assembly, the control assembly is connected with each injection pump, electromagnet, motor and sliding table driving component, the operation and reversing of each injection pump, the on-off of the electromagnet, the rotating parameters of the motor and the movement stroke of the sliding table can be controlled uniformly, and the automatic operation of the whole process of sample sampling, reagent adding, oscillation, cap removing, cap covering and pipetting into a cuvette can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0008] The accompanying drawings, which are included to provide a further understanding of the present application and constitute a part of this application, do not limit the present application, and illustrate embodiments of the present application together with the description. FIG. 1 is a structural schematic diagram of an embodiment of the present application. FIG. 2 is a working principle schematic diagram of the embodiment of the present application. FIG. 3 is a structural schematic diagram of a capping device of the present application. FIG. 4 is a structural schematic diagram of a liquid delivery device of the present application. FIG. 5 is a structural schematic diagram of a liquid adding device of the present application. FIG. 6 is a structural schematic diagram of a rotating disc oscillation device of the present application.

[0009] Wherein, 1. the casing, 2. capping device, 20. capping slide, 21. electromagnet frame, 22. electromagnet, 23. iron cover, 24. distance photoelectric sensor, 3. liquid delivery device, 300. sample liquid injection pump, 301.2, 4 - di nitrophenylhydrazine solution injection pump, 302. potassium hydroxide - methanol solution injection pump, 303. mixed liquid injection pump, 304. sample liquid pipe, 305. add 2, 4 - di nitrophenylhydrazine solution pipe, 306. add potassium hydroxide - methanol solution pipe, 307. mixed liquid pipe, 308. sample liquid pipe prop, 309. sample liquid pipe B, 310. sample liquid pipe A, 311. mixed liquid pipe A, 312. mixed liquid pipe B, 313. mixed liquid pipe C, 314. displacement pipe, 315. 2, 4 - di nitrophenylhydrazine solution pipe, 316. potassium hydroxide - methanol solution pipe, 4. liquid adding device, 40. liquid adding slide, 41. pipeline fixing frame, 5. rotary oscillation device, 50. rotary disc, 51. motor, 60. displacement volumetric flask, 61. sample volumetric flask A, 62. sample volumetric flask B, 63. sample volumetric flask C, 70. sample bottle A, 71. sample bottle B, 72. sample bottle C, 8. 2, 4 - di nitrophenylhydrazine solution bottle, 9. potassium hydroxide - methanol solution bottle, 10. displacement dish, 11. first colorimetric dish, 12. second colorimetric dish, 13. third colorimetric dish. DETAILED DESCRIPTION

[0010] The utility model will be combined with the drawings and specific embodiments to be explained in detail, obviously, the described embodiment is only a part of the utility model embodiment, rather than all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor, all belong to the scope of protection of the utility model, the utility model is not limited to the specific embodiment disclosed below.

[0011] Please see figure 1, the utility model provides a kind of determination of carbonyl compound content in methanol pretreatment device, comprising: casing 1, capping device 2, liquid delivery device 3, liquid adding device 4, rotary oscillation device 5.

[0012] In this embodiment, the rotating disc has four positions for placing the displacement volumetric flask 60, the sample volumetric flask A 61, the sample volumetric flask B 62, and the sample volumetric flask C 63, and can rotate clockwise, counterclockwise, or alternately clockwise and counterclockwise by the motor 51. After placing the four volumetric flasks, the cover sliding table 20 is lowered, the electromagnet 22 is powered, and the iron cover 23 of the sample volumetric flask A 61 is adsorbed. If the iron cover 23 is detected by the photoelectric sensor 24, the cover sliding table 20 is raised. Otherwise, the above process is repeated until the iron cover 23 is successfully adsorbed. Further, the rotating disc 50 rotates to transfer the sample volumetric flask A 61 to the position directly below the sample liquid tube 304, the liquid adding sliding table 40 is lowered, the sample liquid tube 304 is inserted into the sample volumetric flask A 61, and the T port of the sample liquid injection pump 300 is opened while the other ports are closed. Then, 2 ml of sample solution is drawn from the sample bottle A 70 through the sample liquid tube A 310 into the sample liquid injection pump 300, and then the T port and the other ports are closed while the P port is opened. The sample solution is added to the sample volumetric flask A 61 through the sample liquid tube 304. Further, the liquid adding sliding table 40 is raised, the sample liquid tube 304 is separated from the sample volumetric flask A 61, the rotating disc 50 rotates to transfer the displacement volumetric flask 60 to the position directly below the sample liquid tube 304, the liquid adding sliding table 40 is lowered, the sample liquid tube 304 is inserted into the displacement volumetric flask 60, and the A port of the sample liquid injection pump 300 is opened while the other ports are closed. Then, 5 ml of sample solution is drawn from the sample bottle B 71 through the sample liquid tube B 309 into the sample liquid injection pump 300, and then the A port and the other ports are closed while the P port is opened. The sample solution is added to the displacement volumetric flask 60 through the sample liquid tube 304, and the residual liquid in the sample liquid injection pump 300 is replaced by the sample solution in the sample bottle B 71. Then, the rotating disc rotates to transfer the sample volumetric flask A 61 to the position directly below the electromagnet 22, the cover sliding table 20 is lowered, the iron cover 23 is covered on the mouth of the sample volumetric flask A 61, the electromagnet 22 is powered off, the adsorption of the iron cover 23 is stopped, the cover sliding table 20 is raised, and then the rotating disc 50 continues to rotate to transfer the sample volumetric flask B 62 to the position directly below the electromagnet 22. The iron cover 23 of the sample volumetric flask B 62 is removed by the cover adding device 2, and then the rotating disc 50 continues to rotate to transfer the sample volumetric flask B 62 to the position directly below the sample liquid tube 304. The liquid adding sliding table 40 is lowered, the sample liquid tube 304 is inserted into the sample volumetric flask B 62, and the A port of the sample liquid injection pump 300 is opened while the other ports are closed. Then, 2 ml of sample solution is drawn from the sample bottle B 71 through the sample liquid tube B 309 into the sample liquid injection pump 300, and then the A port and the other ports are closed while the P port is opened. The sample solution is added to the sample volumetric flask B 62 through the sample liquid tube 304.The sample solution is added to the sample flask B 62 via the sample addition tube 304, the sample addition slide 40 is then raised and the sample addition tube 304 is withdrawn from the sample flask B 62. Further, the carousel 50 is rotated to bring the displacement flask 60 into position directly below the sample addition tube 304, the sample addition slide 40 is lowered and the sample addition tube 304 is inserted into the displacement flask 60, the sample withdrawal pump 300B is activated and the remaining ports are deactivated, 5ml of sample solution is withdrawn from the sample flask C 72 via the sample withdrawal tube C 308 into the sample withdrawal pump 300, the B port is then deactivated and the remaining ports are deactivated, the P port is activated and the sample solution is added to the displacement flask 60 via the sample addition tube 304, the sample withdrawal pump 300 is then displaced with the sample solution from the sample flask C 71, the carousel 50 is then rotated to bring the sample flask B 62 into position directly below the electromagnet 22, the iron cap 23 of the sample flask B 62 is then clamped in place using the capping device 2, the carousel 50 is then rotated further to bring the sample flask C 63 into position directly below the electromagnet 22, the iron cap 23 of the sample flask C 63 is then unclamped using the capping device 2, the carousel 50 is then rotated further to bring the sample flask C 63 into position directly below the sample addition tube 304, the sample addition slide 40 is lowered and the sample addition tube 304 is inserted into the sample flask C 63, the sample withdrawal pump 300B is activated and the remaining ports are deactivated, 2ml of sample solution is withdrawn from the sample flask C 72 via the sample withdrawal tube C 308 into the sample withdrawal pump 300, the B port is then deactivated and the remaining ports are deactivated, the P port is activated and the sample solution is added to the sample flask C 63 via the sample addition tube 304. Further, the 2,4-dinitrophenylhydrazine solution pump 301T port is activated, the P port is deactivated and 2ml of 2,4-dinitrophenylhydrazine solution is withdrawn from the 2,4-dinitrophenylhydrazine solution flask 8 via the 2,4-dinitrophenylhydrazine solution tube 315 into the 2,4-dinitrophenylhydrazine solution pump 301, the T port is then deactivated and the P port is activated, the 2,4-dinitrophenylhydrazine solution is added to the sample flask C 63 via the 2,4-dinitrophenylhydrazine solution tube 305, the carousel is then rotated to bring the sample flask C 63 into position directly below the electromagnet 22, the iron cap 23 of the sample flask C 63 is then clamped in place using the capping device 2, the carousel 50 is then rotated to bring the sample flask B 62 into position directly below the electromagnet 22, the iron cap 23 of the sample flask B 62 is then unclamped using the capping device 2, the carousel 50 is then rotated further to bring the sample flask B 62 into position directly below the 2,4-dinitrophenylhydrazine solution tube 305,The addition slide 40 is lowered and the 2,4-dinitrophenylhydrazine solution addition tube 305 is inserted into the sample flask B 62. The 2,4-dinitrophenylhydrazine solution pump 301 T port is opened, the P port is closed, 2 ml of 2,4-dinitrophenylhydrazine solution is drawn from the 2,4-dinitrophenylhydrazine solution bottle 8 through the 2,4-dinitrophenylhydrazine solution tube 315 to the 2,4-dinitrophenylhydrazine solution pump 301, the T port is then closed, the P port is opened, and the 2,4-dinitrophenylhydrazine solution is added to the sample flask B 62 through the 2,4-dinitrophenylhydrazine solution addition tube 305. The turntable is then rotated and the sample flask B 62 is moved directly below the electromagnet 22. The sample flask B 62 is capped with the cap 23 using the capping device 2. The turntable 50 is then rotated and the sample flask A 61 is moved directly below the electromagnet 22. The cap 23 is removed from the sample flask A 61 using the capping device 2. The turntable 50 is then rotated further and the sample flask A 61 is moved directly below the 2,4-dinitrophenylhydrazine solution addition tube 305. The addition slide 40 is lowered and the 2,4-dinitrophenylhydrazine solution addition tube 305 is inserted into the sample flask A 61. The 2,4-dinitrophenylhydrazine solution pump 301 T port is opened, the P port is closed, 2 ml of 2,4-dinitrophenylhydrazine solution is drawn from the 2,4-dinitrophenylhydrazine solution bottle 8 through the 2,4-dinitrophenylhydrazine solution tube 315 to the 2,4-dinitrophenylhydrazine solution pump 301, the T port is then closed, the P port is opened, and the 2,4-dinitrophenylhydrazine solution is added to the sample flask A 61 through the 2,4-dinitrophenylhydrazine solution addition tube 305. The turntable is then rotated and the sample flask A 61 is moved directly below the electromagnet 22. The cap 23 is replaced on the sample flask A 61 using the capping device 2 and the sample flasks A 61, B 62, and C 63 are allowed to react at room temperature for 30 minutes. After 30 minutes, the cap 23 is removed from the sample flask A 61 using the capping device 2. The turntable 50 is then rotated further and the sample flask A 61 is moved directly below the potassium hydroxide-methanol solution addition tube 306. The addition slide 40 is lowered and the potassium hydroxide-methanol solution addition tube 306 is inserted into the sample flask A 61. The potassium hydroxide-methanol solution pump 302 T port is then opened, the P port is closed,From the potassium hydroxide-methanol solution bottle 9, 21 ml of potassium hydroxide-methanol solution is drawn along the potassium hydroxide-methanol solution pipe 306 into the potassium hydroxide-methanol solution injection pump 302, then the T port is disconnected and the P port is connected, the potassium hydroxide-methanol solution is added along the potassium hydroxide-methanol solution pipe 306 into the sample capacity bottle A 61, then the turntable 50 continues to rotate, the sample capacity bottle A 61 is switched to directly below the electromagnet 22, after the iron cover 23 of the sample capacity bottle A 61 is tightly covered by the capping device 2, the turntable 50 continues to rotate, the sample capacity bottle B 62 is switched to directly below the electromagnet 22, the iron cover 23 of the sample capacity bottle B 62 is removed by the capping device 2, then the turntable 50 continues to rotate, the sample capacity bottle B 62 is switched to directly below the potassium hydroxide-methanol solution pipe 306, the liquid adding slide table 40 is lowered, the potassium hydroxide-methanol solution pipe 306 is inserted into the sample capacity bottle B 62, at the same time the T port of the potassium hydroxide-methanol solution injection pump 302 is connected and the P port is disconnected, 21 ml of potassium hydroxide-methanol solution is drawn from the potassium hydroxide-methanol solution bottle 9 along the potassium hydroxide-methanol solution pipe 306 into the potassium hydroxide-methanol solution injection pump 302, then the T port is disconnected and the P port is connected, the potassium hydroxide-methanol solution is added along the potassium hydroxide-methanol solution pipe 306 into the sample capacity bottle B 62, then the turntable 50 continues to rotate, the sample capacity bottle B 62 is switched to directly below the electromagnet 22, after the iron cover 23 of the sample capacity bottle B 62 is tightly covered by the capping device 2, the turntable 50 continues to rotate, the sample capacity bottle C 63 is switched to directly below the electromagnet 22, the iron cover 23 of the sample capacity bottle C 63 is removed by the capping device 2, then the turntable 50 continues to rotate, the sample capacity bottle C 63 is switched to directly below the potassium hydroxide-methanol solution pipe 306, the liquid adding slide table 40 is lowered, the potassium hydroxide-methanol solution pipe 306 is inserted into the sample capacity bottle C 63, then the T port of the potassium hydroxide-methanol solution injection pump 302 is connected and the P port is disconnected, 21 ml of potassium hydroxide-methanol solution is drawn from the potassium hydroxide-methanol solution bottle 9 along the potassium hydroxide-methanol solution pipe 306 into the potassium hydroxide-methanol solution injection pump 302, then the T port is disconnected and the P port is connected, the potassium hydroxide-methanol solution is added along the potassium hydroxide-methanol solution pipe 306 into the sample capacity bottle C 63, then the turntable 50 continues to rotate, the sample capacity bottle C 63 is switched to directly below the electromagnet 22,The iron cover 23 of the sample volumetric flask C 63 is tightly capped by using the capping device 2, and then the turntable 50 immediately rotates in a small amplitude and alternately clockwise and counterclockwise, oscillating the reagent in each volumetric flask, and lasts for 10 seconds. After the oscillation is completed, the turntable 50 stops rotating, and the reagent in each volumetric flask is left to stand at room temperature for 12 minutes. After waiting for 12 minutes, the turntable 50 rotates, and the sample volumetric flask A 61 is transferred to directly below the electromagnet 22. The iron cover 23 of the sample volumetric flask A 61 is removed by using the capping device 2. Then the turntable 50 continues to rotate, and the sample volumetric flask A 61 is transferred to directly below the mixed liquid suction pipe 307. The mixed liquid suction pipe 307 is inserted into the sample volumetric flask A 61 by lowering the liquid adding sliding table 40. Then the P port of the mixed liquid injection pump 303 is opened, and the remaining ports are closed. 5 ml of mixed liquid is sucked from the sample volumetric flask A 61 along the mixed liquid suction pipe 307 to the mixed liquid injection pump 303, and then the P port and the remaining ports are closed, and the X port is opened. The mixed liquid is added to the first cuvette 11. Then the turntable 50 rotates, and the sample volumetric flask A 61 is transferred to directly below the electromagnet 22. The iron cover 23 of the sample volumetric flask A 61 is tightly capped by using the capping device 2. Then the turntable 50 continues to drive, and the sample volumetric flask B 62 is transferred to directly below the electromagnet 22. The iron cover 23 of the sample volumetric flask B 62 is removed by using the capping device 2. Then the turntable 50 continues to rotate, and the sample volumetric flask B 62 is transferred to directly below the mixed liquid suction pipe 307. The mixed liquid suction pipe 307 is inserted into the sample volumetric flask B 62 by lowering the liquid adding sliding table 40. Then the P port of the mixed liquid injection pump 303 is opened, and the remaining ports are closed. 10 ml of mixed liquid is sucked from the sample volumetric flask B 62 along the mixed liquid suction pipe 307 to the mixed liquid injection pump 303, and then the P port and the remaining ports are closed, and the T port is opened. The mixed liquid is added to the displacement cuvette 10, so as to achieve the purpose of replacing the residual liquid in the mixed liquid injection pump 303 with the liquid in the sample volumetric flask B 62. After the replacement is completed, the P port of the mixed liquid injection pump 303 is opened again, and the remaining ports are closed. 5 ml of mixed liquid is sucked from the sample volumetric flask B 62 along the mixed liquid suction pipe 307 to the mixed liquid injection pump 303, and then the P port and the remaining ports are closed, and the Y port is opened. The mixed liquid is added to the second cuvette 12. Then the turntable 50 rotates, and the sample volumetric flask B 62 is transferred to directly below the electromagnet 22. The iron cover 23 of the sample volumetric flask B 62 is tightly capped by using the capping device 2. Then the turntable 50 continues to drive, and the sample volumetric flask C 63 is transferred to directly below the electromagnet 22. The iron cover 23 of the sample volumetric flask C 63 is removed by using the capping device 2.Subsequently, the rotating disc 50 continues to rotate, so that the sample volumetric flask C 63 is converted to be directly below the mixed liquid suction pipe 307, the liquid adding slide 40 is lowered, the mixed liquid suction pipe 307 is inserted into the sample volumetric flask C 63, then the mixed liquid injection pump 303P end is opened, the remaining ports are closed, 10ml mixed liquid in the sample volumetric flask C 63 is sucked into the mixed liquid injection pump 303 through the mixed liquid suction pipe 307, then the P end and the remaining ports are closed, the T end is opened, the mixed liquid is added into the displacement dish 10, so as to achieve the purpose of replacing the residual liquid in the mixed liquid injection pump 303 with the liquid in the sample volumetric flask C 63, after the replacement is completed, the mixed liquid injection pump 303P end is opened again, the remaining ports are closed, 5ml mixed liquid in the sample volumetric flask C 63 is sucked into the mixed liquid injection pump 303 through the mixed liquid suction pipe 307, then the P end and the remaining ports are closed, the Y end is opened, the mixed liquid is added into the third colorimetric dish 13, and the pretreatment of each sample is completed.

[0013] The above provides a detailed disclosure and introduction of the technical solutions of the embodiments of the present application. The principles and implementation modes of the embodiments of the present application are described by applying specific examples. The above description of the embodiments is only applicable to help understand the principles of the embodiments of the present application. Meanwhile, for those skilled in the art, the specific implementation modes and application ranges of the embodiments of the present application will be changed, and the content of the present application should not be understood as a limitation of the present application.

Claims

1. A kind of pretreatment device of carbonyl compound content determination in methanol, including shell, capping device, liquid delivery device, liquid adding device, carousel oscillation device, wherein capping device includes capping sliding table, distance photoelectric sensor, electromagnet, electromagnet frame, iron cover;Liquid delivery device includes three sample liquid pipes, sample liquid adding pipe, sample liquid injection pump, 2, 4 - dinitrophenylhydrazine solution extraction pipe, 2, 4 - dinitrophenylhydrazine solution adding pipe, 2, 4 - dinitrophenylhydrazine solution injection pump, potassium hydroxide-methanol solution extraction pipe, potassium hydroxide-methanol solution adding pipe, potassium hydroxide-methanol solution injection pump, mixed liquid extraction pipe, mixed liquid injection pump, three mixed liquid adding pipes and one replacement pipe;Liquid adding device includes liquid adding sliding table and pipeline fixing clamp;Carousel oscillation device includes motor and carousel, characterized in that, The pipeline fixing clamp is installed and fixed on the liquid adding sliding table, and the pipeline fixing clamp clamps and fixes the sample liquid adding pipe, the 2,4-dinitrophenylhydrazine solution adding pipe, the potassium hydroxide-methanol solution adding pipe and the mixed liquid pumping pipe respectively, and can reciprocate linearly with the liquid adding sliding table, one end of the sample liquid adding pipe, the 2,4-dinitrophenylhydrazine solution adding pipe and the potassium hydroxide-methanol solution adding pipe is selected to pass through the pipeline fixing clamp and is clamped and fixed after being set to a length, so as to ensure that the sample liquid adding pipe, the 2,4-dinitrophenylhydrazine solution adding pipe and the potassium hydroxide-methanol solution adding pipe do not adhere to the reagent in the volumetric flask when the reagent is added into the volumetric flask, and an error is not caused; the other end of the sample liquid adding pipe is connected with the sample liquid injection pump P end, the other end of the 2,4-dinitrophenylhydrazine solution adding pipe is connected with the 2,4-dinitrophenylhydrazine solution injection pump P end, the other end of the potassium hydroxide-methanol solution adding pipe is connected with the potassium hydroxide-methanol solution injection pump P end, and the other end of the mixed liquid pumping pipe is connected with the mixed liquid injection pump P end; one end of the three sample liquid pumping pipes is selected to be connected with the sample liquid injection pump T end, A end and B end respectively, and the other end is connected with three sample bottles respectively, one end of the 2,4-dinitrophenylhydrazine solution pumping pipe is connected with the 2,4-dinitrophenylhydrazine solution injection pump T end, and the other end is connected with the 2,4-dinitrophenylhydrazine solution bottle, one end of the potassium hydroxide-methanol solution pumping pipe is connected with the potassium hydroxide-methanol solution injection pump T end, and the other end is connected with the potassium hydroxide-methanol solution bottle, and one end of the three mixed liquid adding pipes is selected to be connected with the mixed liquid injection pump X end, Y end and A end respectively, and the other end is inserted into three cuvettes respectively, one end of the displacement pipe is connected with the mixed liquid injection pump T end, and the other end is inserted into the displacement cup, so as to realize the metering and transfer of each sample and reagent; the electromagnet and the distance photoelectric sensor are installed on the electromagnet frame, the electromagnet frame is installed on the capping sliding table, can reciprocate linearly with the capping sliding table, the iron cover main body is made of nylon material, and a 3mm-thick iron disc is embedded in the upper end; when the electromagnet is powered on, the iron cover is closely adsorbed on the electromagnet, when the electromagnet is powered off, the adsorbed iron cover is released, so as to realize the uncapping and capping operation of the sample volumetric flask; the rotating disc is connected with the motor shaft through a shaft key, the motor can drive the rotating disc to rotate clockwise, counterclockwise or alternately, so as to realize the work position conversion and reagent oscillation in the bottle.

2. The pretreatment device for the determination of the carbonyl compound content in methanol according to claim 1, characterized in that The pipeline fixing clamp adopts a clamping structure capable of firmly clamping each liquid pipe, preventing the liquid pipe from loosening or falling off during pipetting and liquid adding.

3. The pretreatment device for the determination of the carbonyl compound content in methanol according to claim 1, characterized in that The motor is matched with a control component, which can adjust the rotation speed and direction of the rotating disc, and adapt to the oscillation mixing requirements of different samples.

4. The pretreatment device for the determination of the carbonyl compound content in methanol according to claim 1, characterized in that The liquid adding sliding table and the capping sliding table are both provided with a linear driving component, which can realize precise reciprocating linear motion, and improve the precision of liquid adding, uncapping and capping operation of the device.

5. The pretreatment device for the determination of the carbonyl compound content in methanol according to claim 1, characterized in that, The device is also provided with a control assembly electrically connected with the sample liquid injection pump, the 2,4-dinitrophenylhydrazine solution injection pump, the potassium hydroxide-methanol solution injection pump, the mixed solution injection pump, the electromagnet, the motor, the liquid adding sliding table and the capping sliding table, respectively, for controlling the start-stop and reversing of each injection pump, the on-off of the electromagnet, the rotation parameters of the motor and the movement stroke of the sliding table, and completing the automatic operation of the entire pretreatment process.

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