Sample preparation device for food safety detection

Abstract

The invention discloses a sample preparation device for food safety detection, and belongs to the technical field of sample preparation for food safety detection, the sample preparation device comprises a columnar main body, a buffer solution tank and a plurality of groups of uniform shaking sample preparation mechanisms, the side surface of the columnar main body is provided with a plurality of guide chutes arranged in an annular array, the buffer solution tank is clamped at the top of the columnar main body, and the buffer solution tank is clamped at the bottom of the columnar main body. A plurality of liquid outlet pipes are arranged on the buffer liquid tank, and the plurality of liquid outlet pipes extend into the plurality of guide sliding grooves; agricultural products selected by a farmer's market are sampled and then directly put into the uniform shaking and sample preparation mechanism, the uniform shaking and sample preparation mechanism is connected to a corresponding liquid outlet pipe, multiple agricultural products are sampled in sequence, a first valve is opened, and a buffer solution in a buffer solution tank enters the uniform shaking and sample preparation mechanism; a buffer solution in the uniform shaking and sample preparation mechanism washes pesticide residues on a sample under the uniform shaking action and is filtered to complete sample preparation, and the prepared sample can be directly detected after being carried to a detection center, so that the food safety detection efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of food safety detection sample preparation, and in particular relates to a sample preparation device for food safety detection. Background Art

[0002] Food safety testing is to detect harmful substances in food according to national indicators, mainly testing some harmful and toxic indicators, such as heavy metals, aflatoxin, etc.

[0003] At present, when testing pesticide residues in agricultural products in farmers' markets and other places, it is necessary to select a variety of agricultural products and bring them to the testing center for sampling and sample preparation, which affects the efficiency of food safety testing. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems and to propose a sample preparation device for food safety testing.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sample preparation device for food safety detection, which includes a columnar body, a buffer solution tank and multiple groups of shaking sample preparation mechanisms, the side of the columnar body is provided with multiple guide grooves arranged in a circular array, the buffer solution tank is clamped on the top of the columnar body, the buffer solution tank is provided with multiple liquid outlet pipes, the multiple liquid outlet pipes extend into the multiple guide grooves, the liquid outlet pipes are provided with a first valve, the multiple groups of shaking sample preparation mechanisms are respectively arranged in the multiple guide grooves, and the multiple groups of shaking sample preparation mechanisms are respectively connected to the multiple liquid outlet pipes.

[0006] As a further description of the above technical solution:

[0007] A card slot is provided on the top of the columnar body, and the buffer solution is filled into the card slot.

[0008] As a further description of the above technical solution:

[0009] The shaking sample preparation mechanism includes a sample tank, a filter and a sample preparation tank. The sample preparation tank is clamped at the bottom of the guide groove, the filter is screwed at the top of the sample preparation tank, a second valve is provided on the filter, and the sample tank is respectively connected to the liquid outlet pipe and the filter through two spring hoses.

[0010] As a further description of the above technical solution:

[0011] The sample tank comprises a tank body and a tank cover, wherein the tank cover is screwed onto the tank body, the tank body is connected to the filter via the spring hose, and the tank cover is connected to the liquid outlet pipe via the spring hose.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the tank body fits the inner wall of the guide groove.

[0014] As a further description of the above technical solution:

[0015] A filter element is arranged in the filter.

[0016] As a further description of the above technical solution:

[0017] Two handles are arranged on the columnar body.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present invention, agricultural products selected from the farmers' market are sampled and directly placed into a shaking sample preparation mechanism, the shaking sample preparation mechanism is connected to a corresponding liquid outlet pipe, and a plurality of agricultural products are sampled in turn. The first valve is opened to allow the buffer in the buffer tank to enter the shaking sample preparation mechanism. The buffer in the shaking sample preparation mechanism flushes the pesticide residues on the sample under the shaking action and the sample preparation is completed after filtering. The sample can be carried to the testing center for direct testing, which greatly improves the efficiency of food safety testing.

[0020] 2. In the present invention, after sampling, the sample is placed in the sample tank, and the first valve is opened to allow the buffer solution to enter the sample tank from the buffer solution tank. The vibration generated by the entire device during the transfer process causes the two spring hoses to pull the sample tank back and forth, so that the buffer solution is shaken to clean the pesticide residues on the sample. The second valve is opened to allow the buffer solution for cleaning the pesticide residues to enter the sample preparation tank for standby after being filtered by the filter. The sample preparation is completed. After arriving at the testing center, the buffer solution in the sample preparation tank can be taken out for direct testing, which greatly improves the efficiency of food safety testing.

[0021] 3. In the present invention, the screw connection design between the tank body and the tank cover facilitates the taking and placing of the test sample into the sample tank, and also facilitates the connection of the sample tank with the liquid outlet pipe and the filter respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a schematic diagram of the overall structure of a sample preparation device for food safety testing.

[0023] Figure 2 This is an exploded view of a sample preparation device for food safety testing.

[0024] Figure 3 A cross-sectional view of a sample preparation device for food safety testing Figure 1 .

[0025] Figure 4 A cross-sectional view of a sample preparation device for food safety testing Figure 2.

[0026] Legend:

[0027] 1. Columnar body; 2. Buffer tank; 3. Shaking sample preparation mechanism; 31. Sample tank; 311. Tank body; 312. Tank cover; 32. Filter; 33. Sample preparation tank; 4. Guide slide; 5. Liquid outlet pipe; 6. First valve; 7. Card slot; 8. Second valve; 9. Spring hose; 10. Filter element; 11. Handle. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-4 The present invention provides a technical solution: a sample preparation device for food safety detection, comprising a columnar body 1, a buffer tank 2 and a plurality of groups of shaking sample preparation mechanisms 3, a plurality of guide slide grooves 4 arranged in a circular array are provided on the side of the columnar body 1, the buffer tank 2 is clamped on the top of the columnar body 1, a plurality of liquid outlet pipes 5 are arranged on the buffer tank 2, the plurality of liquid outlet pipes 5 extend into the plurality of guide slide grooves 4, a first valve 6 is arranged on the liquid outlet pipe 5, a plurality of groups of shaking sample preparation mechanisms 3 are respectively arranged in the plurality of guide slide grooves 4, and the plurality of groups of shaking sample preparation mechanisms 3 are respectively connected to the plurality of liquid outlet pipes 5;

[0030] A slot 7 is provided on the top of the columnar body 1, and the buffer tank 2 is inserted into the slot 7, so that the buffer tank can be easily removed and cleaned.

[0031] The shaking sample preparation mechanism 3 includes a sample tank 31, a filter 32 and a sample preparation tank 33. The sample preparation tank 33 is clamped at the bottom of the guide slide 4, and the filter 32 is screwed at the top of the sample preparation tank 33. A second valve 8 is arranged on the filter 32. The sample tank 31 is connected to the liquid outlet pipe 5 and the filter 32 respectively through two spring hoses 9. When the sample is taken and put into the sample tank 31, the first valve 6 is opened to allow the buffer solution to enter the sample tank 31 from the buffer solution tank. The vibration generated by the whole device during the transfer process causes the two spring hoses 9 to pull the sample tank 31 back and forth, so that the buffer solution is shaken to clean the pesticide residue on the sample. The second valve 8 is opened to allow the buffer solution for cleaning the pesticide residue to enter the sample preparation tank 33 for standby after being filtered by the filter 32. The sample preparation is completed. After arriving at the detection center, the buffer solution in the sample preparation tank 33 can be taken out and directly detected, which greatly improves the efficiency of food safety detection.

[0032] The sample tank 31 comprises a tank body 311 and a tank cover 312, wherein the tank cover 312 is screwed onto the tank body 311, the tank body 311 is connected to the filter 32 via the spring hose 9, and the tank cover 312 is connected to the liquid outlet pipe 5 via the spring hose 9. The tank body 311 and the tank cover 312 are screwed together to facilitate the taking and placing of the test sample into the sample tank 31, and also facilitate the connection of the sample tank 31 with the liquid outlet pipe 5 and the filter 32 respectively.

[0033] The outer wall of the tank body 311 fits the inner wall of the guide groove 4, which has a guiding effect on the elastic swing of the tank body 311;

[0034] The filter 32 is provided with a filter element 10 to facilitate filtering the buffer solution for cleaning pesticide residues;

[0035] The columnar body 1 is provided with two handles 11, so that the whole device is easy to carry.

[0036] Working principle: First, remove the elastic hoses connected to the tank body 311 and the tank cover 312 respectively, unscrew the tank cover 312, directly sample the selected sample to be tested at the farmer's market and put it into the tank body 311, screw the tank cover 312 back on the tank body 311 to complete the sampling of a single agricultural product, repeat the operation to complete the sampling of multiple agricultural products, then connect the tank cover 312 and the tank body 311 to the corresponding spring hose 9 to complete the connection of the sample tank 31, install multiple sample tanks 31 in sequence, and then open the first valve 6 to make the buffer The liquid enters the sample tank 31 from the buffer tank. The vibration of the entire device during the transfer process causes the two spring hoses 9 to pull the sample tank 31 back and forth, so that the buffer solution is shaken and cleaned of the pesticide residues on the sample. The second valve 8 is opened to allow the buffer solution for cleaning the pesticide residues to enter the sample preparation tank 33 for standby use after being filtered by the filter 32. The sample preparation is completed. Finally, after arriving at the testing center, the filter 32 is unscrewed and the sample preparation tank 33 is removed. The buffer solution in the sample preparation tank 33 can be taken out for direct testing, which greatly improves the efficiency of food safety testing.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sample preparation device for food safety testing, characterized in that: The invention comprises a columnar body (1), a buffer tank (2) and a plurality of shaking sample preparation mechanisms (3); a plurality of guide grooves (4) arranged in a ring array are provided on the side of the columnar body (1); the buffer tank (2) is clamped on the top of the columnar body (1); a plurality of liquid outlet pipes (5) are provided on the buffer tank (2); the plurality of liquid outlet pipes (5) extend into the plurality of guide grooves (4); a first valve (6) is provided on the liquid outlet pipes (5); the plurality of shaking sample preparation mechanisms (3) are respectively arranged in the plurality of guide grooves (4); and the plurality of shaking sample preparation mechanisms (3) are respectively connected to the plurality of liquid outlet pipes (5).

2. A sample preparation device for food safety testing according to claim 1, characterized in that: A slot (7) is provided on the top of the columnar body (1), and the buffer tank (2) is inserted into the slot (7).

3. A sample preparation device for food safety testing according to claim 1, characterized in that: The shaking sample preparation mechanism (3) comprises a sample tank (31), a filter (32) and a sample preparation tank (33); the sample preparation tank (33) is clamped on the bottom of the guide groove (4); the filter (32) is screwed on the top of the sample preparation tank (33); a second valve (8) is provided on the filter (32); and the sample tank (31) is respectively connected to the liquid outlet pipe (5) and the filter (32) through two spring hoses (9).

4. A sample preparation device for food safety testing according to claim 3, characterized in that: The sample tank (31) comprises a tank body (311) and a tank cover (312), wherein the tank cover (312) is screwed onto the tank body (311), the tank body (311) is connected to the filter (32) via the spring hose (9), and the tank cover (312) is connected to the liquid outlet pipe (5) via the spring hose (9).

5. A sample preparation device for food safety testing according to claim 4, characterized in that: The outer wall of the tank body (311) fits the inner wall of the guide groove (4).

6. A sample preparation device for food safety testing according to claim 5, characterized in that: A filter element (10) is arranged in the filter (32).

7. A sample preparation device for food safety testing according to claim 1, characterized in that: The columnar body (1) is provided with two handles (11).

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