CN211122546U

CN211122546U - Rapid detection kit for residual quantity of sulfur dioxide in food

Info

Publication number: CN211122546U
Application number: CN201921906810.8U
Authority: CN
Inventors: 张雅莉; 高俊海; 富玉
Original assignee: Pony Test Co
Current assignee: Pony Test Co
Priority date: 2019-11-02
Filing date: 2019-11-02
Publication date: 2020-07-28
Anticipated expiration: 2029-11-02

Abstract

The utility model belongs to food safety short-term test field relates to a sulfur dioxide residual quantity short-term test kit in food, including the box body and arrange color development liquid A, color development liquid B, color development liquid C, extract, sample extraction tube, sample detection tube, straw, color comparison card and description in the box in, can realize the quick semi-quantitative detection of the sulfur dioxide residual quantity in the sample, easy operation, it is with low costs, can satisfy the demand that witnessed inspections and laboratory detected.

Description

Rapid detection kit for residual quantity of sulfur dioxide in food

Technical Field

The utility model belongs to food safety short-term test field relates to a sulfur dioxide residue amount short-term test reagent gold in food.

Background

Sulfur dioxide in food is commonly referred to as sulfur dioxide and inorganic sulfites capable of generating sulfur dioxide, and includes sulfur dioxide, potassium metabisulfite, sodium sulfite, sodium bisulfite, sodium hyposulfite, etc., and is a bleaching agent, preservative and antioxidant widely used in the food industry. However, sulfur dioxide and its derivatives are not only harmful to the respiratory system of humans, but also cause lesions in the brain, liver, spleen, kidney, and even the reproductive system. The GB 2760 plus 2014 food safety national standard food additive use standard of China stipulates the residual limit of sulfur dioxide in various food matrixes.

The existing method for detecting sulfur dioxide in food mainly comprises a pararosaniline hydrochloride colorimetric method and a distillation direct titration method, wherein the pararosaniline hydrochloride colorimetric method uses a large amount of toxic substances and has great harm to people and environment; the latter is easy to operate, but subjective factors of operators have a great influence on experimental results. In addition, the method also comprises a chromatography method, an amperometry method and a chemiluminescence method, but the methods are complex to operate, most of the methods need expensive instruments, special technicians are needed for detection, and the method is difficult to be applied to the rapid field detection of the residual quantity of sulfur dioxide in a large number of food samples.

Disclosure of Invention

The utility model discloses an useful part lies in, can provide a quick detect reagent box of sulfur dioxide residual quantity in food.

In order to realize the above function, the utility model relates to a sulfur dioxide residual quantity short-term test kit in food, a serial communication port, including box body (1) and arrange the detection articles for use in box body (1) in, specifically include: a black plastic dropping bottle respectively filled with a color developing liquid A (2), a color developing liquid B (3) and a color developing liquid C (4), a plastic bottle filled with an extracting solution (5), a sample extracting tube (6), a sample detecting tube (7), a suction tube (8), a colorimetric card (9) and a specification (10).

Wherein the color developing solution A (2) is a dichromate solution with a concentration of 0.25 mmol/L, the color developing solution B (3) is a sulfuric acid solution with a concentration of 4.5 mol/L, the color developing solution C (4) is a dibenzoyl dihydrazinone acetone solution with a concentration of 5.16 mmol/L, and the extracting solution (5) is a phosphate buffer solution with a pH of 1.

The residual quantity of sulfur dioxide indicated by the color chart (9) is 0, 20, 50, 100 and 200mg/kg, and the corresponding color development range is purple red to colorless.

Has the advantages that:

1. the detection method provided by the kit is simple, safe, efficient and convenient; the rapid detection can be realized by a small amount of detection reagent, and the detection cost is low; the detection result has better accuracy and precision, and meets the requirement of quickly detecting the residual quantity of sulfur dioxide in food.

2. The detection reagent in the kit has stable reaction system, easy storage and long quality guarantee period (more than 6 months), can be directly used as a commodity, and commercializes the detection technology.

3. The kit does not need complex equipment, has no requirement on detection places, is also suitable for non-professional personnel to operate, and can meet the requirements of on-site rapid detection or laboratory detection of departments such as individuals, enterprises, quality supervision, industry and commerce and the like.

Drawings

Figure 1 is a schematic view of the rapid detection kit for sulfur dioxide residue in food of the present invention.

Wherein: 1. a box body; 2. a color developing solution A; 3. a color developing solution B; 4. a color developing solution C; 5. extracting solution; 6. a sample extraction tube; 7. a sample detection tube; 8. a straw; 9. a color comparison card; 10. and (6) instructions.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example one

a. Sample pretreatment, namely shearing the sample, uniformly mixing, putting 1g of the sample into a sample extraction tube respectively, adding the extracting solution to 10m L, uniformly mixing, and standing for 5min for later use.

b. And (C) color development, namely putting 1m L of the sample solution to be detected obtained in the step a into a sample detection tube, adding 1 drop of each of the color development liquid A and the color development liquid B into the sample detection tube, shaking up, adding 1 drop of the color development liquid C, shaking up and standing for 5-10 min.

c. Reading: and c, comparing the color developing solution obtained in the step b with a color comparison card to obtain the residual quantity of sulfur dioxide in the sample to be detected.

The above embodiments are provided for illustrative purposes only, and are not intended to limit the present invention: it should be noted that, for a person skilled in the art, various changes and modifications can be made without departing from the scope of the invention, which is within the protection scope of the invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a sulfur dioxide residual quantity short-term test kit in food which characterized in that, includes box body (1) and arranges the detection articles for use in box body (1), specifically includes: a black plastic dropping bottle respectively filled with a color developing liquid A (2), a color developing liquid B (3) and a color developing liquid C (4), a plastic bottle filled with an extracting solution (5), a sample extracting tube (6), a sample detecting tube (7), a suction tube (8), a colorimetric card (9) and a specification (10).

2. The kit for rapidly detecting the residual amount of sulfur dioxide in food according to claim 1, wherein the color-developing solution A (2) is a dichromate solution having a concentration of 0.25 mmol/L.

3. The kit for rapidly detecting the residual amount of sulfur dioxide in food according to claim 1, wherein the color-developing solution B (3) is a sulfuric acid solution having a concentration of 4.5 mol/L.

4. The kit for rapidly detecting the residual amount of sulfur dioxide in food according to claim 1, wherein the color developing solution C (4) is a dibenzoyl dihydrazido acetone solution with a concentration of 5.16 mmol/L.

5. The kit for rapidly detecting the residual amount of sulfur dioxide in food according to claim 1, wherein the extract (5) is phosphate buffer with pH of 1.

6. The kit for rapidly detecting the residual amount of sulfur dioxide in food according to claim 1, wherein the residual amount of sulfur dioxide indicated by the color chart (9) is 0, 20, 50, 100, 200mg/kg, and the corresponding color development range is from purple to colorless.