Rapid detection device for food additives

Abstract

The utility model provides a rapid detection device for food additives, which comprises a sample table configured to be used for bearing a to-be-detected solution in which the food additives are dissolved; the titrant adding assembly comprises a titration dosage cylinder, a one-way valve and a titrator which are connected in sequence, the titration dosage cylinder is configured to contain a sodium hydroxide standard titration solution, the titration dosage cylinder is provided with a piston driven and controlled by the driving part, and the piston drives the sodium hydroxide standard titration solution to flow through the one-way valve and the titrator in sequence; the indicator adding assembly comprises an indicator adding cylinder configured to contain a phenolphthalein indicator, so that the accuracy and efficiency of citric acid content detection are improved, the operation process is simplified, the cost is reduced, and a new solution is provided for rapid detection in the field of food safety.

Description

Technical Field

[0001] The utility model relates to a detection device, in particular to a food additive rapid detection device. Background Art

[0002] Accurate detection of food additives is crucial to ensure food safety, especially citric acid, which is one of the most widely used food additives. The precise determination of its content is directly related to the quality and safety of food. Traditional citric acid detection methods, such as high performance liquid chromatography (HPLC) and gas chromatography (GC), are highly accurate, but they are complex to operate, costly, and time-consuming, and are not suitable for on-site rapid detection scenarios.

[0003] Titration, as a classic chemical analysis method, is widely used in the field of food additive detection due to its simple operation, low cost, and reliable results. In particular, the titration color change method can determine the titration endpoint by the change in the color of the indicator, which can achieve rapid and intuitive quantitative analysis. However, most existing titration equipment is manually operated, with problems of low efficiency and poor repeatability, especially when processing large batches of samples, and it is difficult to meet the needs of efficient and accurate detection. Utility Model Content

[0004] The utility model aims to provide a food additive rapid detection device for rapidly measuring the citric acid content of food additives, and aims to achieve automated and efficient citric acid content detection in view of the deficiencies of the prior art.

[0005] To achieve the above objectives, the present technical solution provides a rapid detection device for food additives, comprising:

[0006] A sample table, configured to carry a solution to be tested in which food additives are dissolved;

[0007] The titrant adding assembly comprises a titration dosage cylinder, a one-way valve and a burette connected in sequence, wherein the titration dosage cylinder is configured to contain a sodium hydroxide standard titration solution, and the titration dosage cylinder is provided with a piston driven and controlled by a driving member, and the piston drives the sodium hydroxide standard titration solution to flow through the one-way valve and the burette in sequence;

[0008] An indicator addition assembly includes an indicator addition cartridge configured to contain a phenolphthalein indicator.

[0009] Compared with the prior art, the present technical solution has the following characteristics and beneficial effects: by integrating the titrant addition component and the indicator addition component, combined with the automated titration process, the detection efficiency is greatly improved, human errors are reduced, and the accuracy and consistency of the detection results are ensured; the dual-station design of the sample carrier and the automatic addition mechanism of the indicator and titrant simplify the operation process, so that a single person can complete the rapid detection of batch samples, reducing the difficulty of operation. Compared with traditional high-cost detection technology, this solution reduces the manufacturing cost and operating cost of the equipment through optimized design, while improving the detection efficiency. It not only improves the accuracy and efficiency of citric acid content detection, but also simplifies the operation process and reduces costs, providing a new solution for rapid detection in the field of food safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the food additive rapid detection device provided in this scheme.

[0011] Figure 2 It is a schematic diagram of the structure of the indicator adding cylinder of this scheme.

[0012] Figure 3 It is a schematic diagram of the structure of the titrant addition component of this scheme.

[0013] Figure 4 It is a schematic diagram of the internal structure of the titrant addition component of this scheme.

[0014] In the figure: 10-sample table, 11-turntable, 12-sample bearing platform, 121-sample fixing platform, 122-clamping piece, 123-fixed frame; 20-titrant adding assembly, 21-titration dosage cylinder, 211-measuring cylinder body, 212-liquid level sensor, 213-piston, 22-check valve, 23-burette, 231-titration body, 232-drip nozzle, 24-driving piece, 25-delivery tube; 30-indicator adding assembly, 31-lifting platform, 32-indicator bearing platform, 33-indicator adding cylinder. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0016] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0017] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0018] The present invention provides a rapid detection device for food additives, which is suitable for detecting the citric acid content in the food additive citric acid by using a titration color change method. Phenolphthalein is used as an indicator, and a solution containing the food additive is titrated with a sodium hydroxide standard titration solution. When the phenolphthalein changes color to pink, the amount of the consumed sodium hydroxide standard titration solution is used to convert and calculate the citric acid content.

[0019] like Figure 1 As shown, the food additive rapid detection device provided by this scheme includes:

[0020] The sample table 10 is configured to carry a solution to be tested in which food additives are dissolved;

[0021] The titrant adding assembly 20 includes a titration dosage cylinder 21, a one-way valve 22 and a burette 23 connected in sequence, wherein the titration dosage cylinder 21 is configured to contain a sodium hydroxide standard titration solution, and the titration dosage cylinder 21 is provided with a piston driven and controlled by a driving member 24, and the piston drives the sodium hydroxide standard titration solution to flow through the one-way valve 22 and the burette 23 in sequence;

[0022] The indicator adding assembly 30 includes an indicator adding cartridge 33 configured to contain the phenolphthalein indicator.

[0023] Specifically, the titrant adding component 20 of the food additive rapid detection device provided by the present invention is added with a sodium hydroxide standard titration solution, and the indicator adding component 30 is added with a phenolphthalein indicator. The phenolphthalein indicator is added to the test solution and titrated with a sodium hydroxide standard titration solution to quickly obtain the content of citric acid, a food additive.

[0024] The titrant adding assembly 20 and the indicator adding assembly 30 of the present solution are respectively placed on both sides of the sample table 10, so as to add the phenolphthalein indicator and the sodium hydroxide standard titration solution to the test solution. Figure 1 As shown, the sample platform 10 provided by the present solution includes a turntable 11 which can be controlled to rotate and two sample bearing platforms 12 placed on the turntable 12. When one sample bearing platform 12 is located at a first position which is set on the same vertical axis as the titrant adding component 20, the other sample bearing platform 12 is located at a second position which is set on the same vertical axis as the indicator adding component 30. The advantage of such a setting is that when the solution to be tested located on one sample bearing platform 12 is at the second position and the addition of the phenolphthalein indicator is completed, the sample bearing platform 12 can be rotated to the first position to titrate the titrant, and at the same time, the other sample bearing platform 12 can be rotated to the second position.

[0025] In some embodiments, the turntable 11 of the present solution is rotatably disposed on a fixed tabletop via a rotating shaft, and the rotation of the rotating shaft is driven to drive the rotation of the turntable 11 . There is no particular limitation on the rotation driving method of the turntable.

[0026] In addition, in order to achieve stable clamping of the solution to be tested, each sample supporting platform 12 designed in the present scheme includes a sample fixing platform 121 configured to place a container containing the solution to be tested, and relatively movable clamping members 122 are arranged on opposite sides of the sample fixing platform 121. When the clamping members 122 are relatively close to each other, the two opposite clamping members 122 clamp the container; when the clamping members 122 are relatively far away from each other, the two opposite clamping members 122 release the clamping of the container.

[0027] In order to realize the movement of the clamping member 122, the sample carrying platform 12 of the present solution is additionally designed with a fixing frame 123, and two clamping members 122 arranged opposite to each other are respectively and movably connected to the fixing frame 123, and the clamping member 122 can clamp the container by controlling the movement of the clamping member 122 relative to the fixing frame 123. Specifically, in some embodiments, the clamping member 122 is connected to the fixing frame 123 through an elastic body, and when the elastic body is in a natural state, the two clamping members 122 are close to each other, and when it is necessary to move away from the two clamping members 122, the elastic body can be manually or electrically controlled to be compressed.

[0028] In addition, when the sample carrier 12 is in the first position, the sample fixing platform 121 is disposed opposite to the titrator 23 , and when the sample carrier 12 is in the second position, the sample fixing platform 121 is disposed opposite to the indicator adding cylinder 33 .

[0029] In order to achieve the addition of phenolphthalein indicator, the indicator adding assembly 30 designed in this solution includes an indicator adding cylinder 33 located above the sample carrying platform 12, wherein the indicator adding cylinder 33 contains the phenolphthalein indicator. Figure 1 and Figure 2 As shown, the indicator adding cylinder 33 of this scheme is connected to the adding control part, and when the adding control part is triggered, the indicator adding cylinder 33 will drip a set amount of phenolphthalein indicator to the solution to be tested below. Specifically, a push piston is set in the indicator adding cylinder 33, and the push piston is controlled by the adding control part. Whenever the adding control part is triggered, the push piston moves toward the direction of the indicator adding cylinder 33 to form a setting to push out a set amount of phenolphthalein indicator. In addition, an adding port is provided at the top of the indicator adding cylinder 33, and an adding port cap is configured to close the adding port corresponding to the adding port. When the content of the phenolphthalein indicator in the indicator adding cylinder 33 is not enough, the adding port cap is opened to add the phenolphthalein indicator in the indicator adding cylinder 33.

[0030] like Figure 1 As shown, in order to avoid splashing of the phenolphthalein indicator when it is added to the solution to be tested, the indicator adding assembly 30 of the present solution includes a lifting platform 31 and an indicator bearing platform 32 which is lifted relative to the lifting platform 31, and the indicator adding cylinder 33 is arranged on the indicator bearing platform 32. Specifically, a lifting track is provided in the lifting platform 31, and a pulley is provided at one end of the indicator bearing platform 32. When the indicator bearing platform 32 is placed in the lifting platform 31, the lifting is realized by the configuration of the pulley and the lifting track;

[0031] In addition, a limit member is provided on one end side of the indicator carrier 32 and is telescopically arranged relative to the indicator carrier 32. A limit groove matching the limit member is provided at a set position in the lifting track. The cooperation between the limit groove and the limit member can achieve the effect of limiting and fixing the indicator carrier 32 on the lifting track.

[0032] It should be noted that, when it is necessary to add phenolphthalein indicator to the test solution, the regulating limit member is retracted into the indicator carrier platform 32 and the indicator carrier platform 32 is slid downward by the pulley. When it drops to the set position, the regulating limit member is extended relative to the indicator carrier platform 32 and inserted into the limiting groove to achieve the limiting fixation of the indicator carrier platform 32. Subsequently, the indicator adding cylinder 33 is controlled by the adding control member to add a fixed amount of phenolphthalein indicator.

[0033] like Figure 3 and Figure 4As shown, the titrant adding assembly 20 designed in this scheme includes a titration dosage cylinder 21 configured to carry a sodium hydroxide standard solution. The sodium hydroxide standard solution in the titration dosage cylinder 21 can be squeezed out from the titrator 23 under the action of a driving member 24, and the citric acid content is determined by adding the sodium hydroxide standard solution to the solution to be tested to the amount of the phenolphthalein indicator.

[0034] Specifically, the titration dose cylinder 21 of the present solution includes a titration dose cylinder 21, a piston 213 controlled by a driving member 24 is arranged at the bottom of the titration dose cylinder 21, the top of the titration dose cylinder 21 is connected to the one-way valve 22, and the piston 213 pushes the sodium hydroxide standard solution from bottom to top under the drive of the driving member 24 to flow out of the one-way valve 22.

[0035] In order to achieve accurate measurement, the side wall of the titration dosage cylinder 21 of the present solution is provided with a transparent window, and the transparent window is provided with a scale line, and the volume of the sodium hydroxide standard solution that has been titrated can be obtained by manually reading the scale on the scale line. In addition, the control element 24 provided in the present solution is a stepping motor with uniform stepping speed, and the titration amount of the sodium hydroxide standard solution can also be further determined by the working time of the stepping motor.

[0036] In some embodiments, a liquid level sensor 212 is further provided inside the titration dosage cylinder 21 , and the titration amount of the sodium hydroxide standard solution can also be obtained by detecting the liquid level height in the titration dosage cylinder 21 by the liquid level sensor 212 .

[0037] The one-way valve 22 of the present solution is connected to the burette 23 through the delivery pipe 25, and the delivery pipe 25 is arranged in an inclined direction from the one-way valve 22 to the burette 23 to facilitate the circulation of the sodium hydroxide standard solution. In some embodiments, the burette 23 provided by the present solution includes a conducting titration body 231 and a drip nozzle 232 located at the bottom of the titration body 231. The advantage of such an arrangement is that the sodium hydroxide standard solution can be dripped into the solution to be tested in a concentrated manner.

[0038] In some embodiments, the one-way valve 22 is arranged to be rotationally connected with the titration dosage cylinder 21, and the rotation of the one-way valve 22 drives the rotation of the delivery tube 25 and the titrator 23. The advantage of this arrangement is that the titrator 23 can be transferred to the top of the sample carrier 12 for titration when titration is needed.

[0039] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A rapid detection device for food additives, characterized in that: include: A sample table (10) is configured to carry a solution to be tested in which a food additive is dissolved; The titrant adding assembly (20) comprises a titration dosage cylinder (21), a one-way valve (22) and a titrator (23) which are connected in sequence, wherein the titration dosage cylinder (21) is configured to contain a sodium hydroxide standard titration solution, and the titration dosage cylinder (21) is provided with a piston driven and controlled by a driving member (24), and the piston drives the sodium hydroxide standard titration solution to flow through the one-way valve (22) and the titrator (23) in sequence; The indicator addition assembly (30) includes an indicator addition cartridge (33) configured to contain a phenolphthalein indicator.

2. The food additive rapid detection device according to claim 1, characterized in that: The sample platform (10) comprises a turntable (11) which is controllably rotatable and two sample bearing platforms (12) placed on the turntable (11); when one sample bearing platform (12) is located at a first position arranged on the same vertical axis as a titrant addition component (20), the other sample bearing platform (12) is located at a second position arranged on the same vertical axis as an indicator addition component (30).

3. The food additive rapid detection device according to claim 2, characterized in that: Each sample carrying platform (12) comprises a sample fixing platform (121) configured to place a container containing a solution to be tested, and relatively movable clamping members (122) are arranged on opposite sides of the sample fixing platform (121).

4. The food additive rapid detection device according to claim 2, characterized in that: The sample bearing platform (12) is additionally designed with a fixing frame (123), and two clamping members (122) arranged opposite to each other are respectively movably connected to the fixing frame (123).

5. The food additive rapid detection device according to claim 1, characterized in that: The indicator adding cylinder (33) is connected to the adding control part. A pushing piston is arranged in the indicator adding cylinder (33). The pushing piston is controlled by the adding control part. Whenever the adding control part is triggered, the pushing piston moves in a set direction toward the indicator adding cylinder (33) to push out a set amount of phenolphthalein indicator.

6. The food additive rapid detection device according to claim 1, characterized in that: The indicator adding assembly (30) comprises a lifting platform (31) and an indicator carrying platform (32) which is arranged to be lifted relative to the lifting platform (31); the indicator adding cylinder (33) is arranged on the indicator carrying platform (32).

7. The food additive rapid detection device according to claim 1, characterized in that: The top of the indicator adding cylinder (33) is provided with an adding port, and an adding port cap is arranged corresponding to the adding port to seal the adding port.

8. The food additive rapid detection device according to claim 1, characterized in that: A piston (213) controlled by a driving member (24) is arranged at the bottom of the titration cylinder (21), and the top of the titration cylinder (21) is connected to the one-way valve (22). Driven by the driving member (24), the piston (213) pushes the sodium hydroxide standard solution from bottom to top to flow out of the one-way valve (22).

9. The food additive rapid detection device according to claim 1, characterized in that: The side wall of the titration dosage cylinder (21) is provided with a transparent window, and scale lines are provided on the transparent window.

10. The food additive rapid detection device according to claim 1, characterized in that: A liquid level sensor (212) is also provided inside the titration dosage cylinder (21).

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