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Sulfite detection reagent and detection method thereof

A technology of sulfite and detection reagents, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problems of inconvenient operation, easy oxidation and deterioration, etc., and achieve composition Simple, improved detection efficiency, and good market prospects

Inactive Publication Date: 2018-01-16
南京御匾国健生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the rapid detection kits for food sulfites on the market are in the form of liquid reagents and are composed of multiple reagents, which is very inconvenient to operate and easy to oxidize and deteriorate during storage.

Method used

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  • Sulfite detection reagent and detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A sulfite detection reagent, comprising the following components in parts by weight: 12 parts of 5,5-dithiobis(2-nitrobenzoic acid), 1 part of sodium tetrachloromercury, and 12 parts of pararosaniline hydrochloride parts, 12 parts acetic acid, 1 part barium chloride, 8 parts aluminum foam, 1 part sodium bicarbonate, 13 parts chitin, 2 parts sodium molybdate, 1 part formaldehyde, 13 parts glycerin, 13 parts zinc acetate, 60 parts water .

[0014] The detection method of the above-mentioned sulfite detection reagent includes the following steps: mixing the sample to be tested with water, decocting at a low heat, filtering and collecting the filtrate, adding 1 drop of the sulfite detection reagent to the filtrate, standing for 1 min, and observing the color change , when the color in the filtrate is purple.

Embodiment 2

[0016] A sulfite detection reagent, comprising the following components in parts by weight: 16 parts of 5,5-dithiobis(2-nitrobenzoic acid), 3 parts of sodium tetrachloromercury, and 18 parts of pararosaniline hydrochloride parts, 20 parts of acetic acid, 25 parts of barium chloride, 10 parts of aluminum foam, 4 parts of sodium bicarbonate, 15 parts of chitin, 5 parts of sodium molybdate, 1 part of formaldehyde, 14 parts of glycerin, 20 parts of zinc acetate, 68 parts of water .

[0017] The detection method of the above-mentioned sulfite detection reagent includes the following steps: mixing the sample to be tested with water, decocting in a slow fire, filtering and taking the filtrate, adding 2 drops of the sulfite detection reagent to the filtrate, standing for 2 minutes, and observing the color change , when the color in the filtrate is purple.

Embodiment 3

[0019] A sulfite detection reagent, comprising the following components in parts by weight: 18 parts of 5,5-dithiobis(2-nitrobenzoic acid), 5 parts of sodium tetrachloromercury, 21 parts of pararosaniline hydrochloride parts, 28 parts of acetic acid, 28 parts of barium chloride, 14 parts of foam aluminum, 8 parts of sodium bicarbonate, 18 parts of chitin, 7 parts of sodium molybdate, 3 parts of formaldehyde, 18 parts of glycerin, 28 parts of zinc acetate, 78 parts of water .

[0020] The detection method of the above-mentioned sulfite detection reagent includes the following steps: mixing the sample to be tested with water, decocting in a slow fire, filtering and collecting the filtrate, adding 3 drops of the sulfite detection reagent to the filtrate, standing for 3 minutes, and observing the color change , when the color in the filtrate is purple.

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Abstract

The invention discloses a sulfite detection reagent and a detection method thereof. The reagent comprises the following ingredients: 5,5-dithio-bis(2-nitrobenzoic acid), sodium tetrachloromercurate, pararosaniline hydrochloride, acetic acid, barium chloride, foamed aluminium, sodium bicarbonate, chitin, sodium molybdate, formaldehyde, glycerin, zinc acetate and water. The detection method comprises the following process: crushing a sample when the sample to be tested is a solid and then adding deionized water, decocting with slow fire, filtering and taking a filtrate, adding 1-3 droplets of the sulfite detection reagent into the filtrate, standing for 1-3 min, and observing color change (the solution turns amaranth when concentration value of sulfite is higher than 0.08 microgram / g; and the solution will not change color when concentration value of nitrite is lower than 0.08 microgram / g); and directly dropwise adding the sulfite detection reagent if the sample to be tested is a liquid.The test paper can rapidly detect content of sulfite in food, is convenient to transport and carry, and is convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of chemical component detection, and in particular relates to a sulfite detection reagent and a detection method thereof. Background technique [0002] Sulfite is a food additive that prevents browning of food by inhibiting non-enzymatic and enzymatic browning. However, the intake of sulfite needs to be strictly controlled. Excessive intake may cause gastrointestinal disorders, severe abdominal pain, renal dysfunction and other diseases. The detection methods of sulfite in food mainly include titration method, spectrophotometer, electrochemical method, etc. [0003] With the improvement of living standards, as people pay more and more attention to the problem of food additive residues including sulfites in food, market supervision is also more and more in place. At present, most of the rapid detection kits for food sulfites on the market are in the form of liquid reagents, and they are composed of multiple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 孔维海
Owner 南京御匾国健生物科技有限公司
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