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Nitrite quick detecting reagent box and application thereof

A technology for rapid determination of nitrite, applied in color/spectral characteristic measurement, analysis through chemical reaction of materials, material analysis through observation of the impact on chemical indicators, etc., can solve unfavorable popularization and on-site determination, Complicated operation steps, requiring equipment and other problems, to achieve the effect of easy on-site measurement, low price, and easy popularization

Inactive Publication Date: 2007-03-28
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the sulfanil hydrochloric acid solution-naphthalene ethylenediamine hydrochloride colorimetric method is widely used in China to determine the amount of nitrite residues in food, but the operation steps in the determination process are complex and require instruments and equipment, which is not conducive to popularization and on-site determination
Some rapid determination methods for nitrite are generally qualitative determination, low sensitivity, and some detection time is long. Assay kit; so it is urgent to develop a rapid semi-quantitative detection method

Method used

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  • Nitrite quick detecting reagent box and application thereof
  • Nitrite quick detecting reagent box and application thereof

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Experimental program
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Effect test

Embodiment 1

[0039] The nitrite rapid determination kit is equipped with 5 reaction columns, wherein the reaction column is composed of a colorless and transparent column body (1), 2 sieve plates (3), and enrichment materials (2). The enrichment material (2) of strong basic anion exchange resin and 2 sieve trays (3) are housed in the column body of reaction column (1), and the quality of enrichment material is the amount required for each determination, that is, each reactor is equipped with There was 1.5 g of strongly basic anion exchange resin, model D290, used as enrichment material. There are also 20mL of 10g / L p-aminobenzenesulfonic acid hydrochloride solution, 500mL of 4.17g / L 1-naphthol, 150mL of borax saturated solution, 70mL of 100g / L potassium ferrocyanide solution, and 220g / L zinc acetate solution in the kit. 70mL, 25mL colorimetric tubes, 1 standard colorimetric card, the standard colorimetric card is a red series color card, the minimum detection limit of this card is 0.1mg / Kg...

Embodiment 2

[0045] The nitrite rapid determination kit is equipped with 10 reaction columns, and the reaction column is equipped with 2.0 g of strong basic anion exchange resin, the model of which is D290, which is used as the enrichment material. There are also 20mL of 10g / L p-aminobenzenesulfonic acid hydrochloride solution, 500mL of 4.17g / L 1-naphthol, 150mL of borax saturated solution, 70mL of 100g / L potassium ferrocyanide solution, and 220g / L zinc acetate solution in the kit. 70mL, 25mL colorimetric tubes, 1 standard colorimetric card, the standard colorimetric card is a red series color card, the minimum detection limit of this card is 0.1mg / Kg. As shown in Figure 1, the red color of the standard color card is divided into 5 grades from light to dark; and the corresponding nitrite concentrations measured are 0.1mg / Kg, 0.2mg / Kg, 0.3mg / Kg, 0.5 mg / Kg, 0.7mg / Kg. Others are with embodiment 1.

Embodiment 3

[0049] The nitrite rapid determination kit is equipped with 7 reaction columns, and the reaction column is equipped with 2.0 g of strong basic anion exchange resin, the model of which is D290, which is used as the enrichment material. There are also 20mL of 11g / L p-aminobenzenesulfonic acid hydrochloride solution, 500mL of 5.0g / L 1-naphthol, 150mL of borax saturated solution, 70mL of 110g / L potassium ferrocyanide solution, and 230g / L zinc acetate solution in the kit. 70mL, 25mL colorimetric tubes, 1 standard colorimetric card, the standard colorimetric card is a red series color card, the minimum detection limit of this card is 0.1mg / Kg. As shown in Figure 1, the red color of the standard color card is divided into 5 grades from light to dark; and the corresponding nitrite concentrations measured are 0.1mg / Kg, 0.2mg / Kg, 0.3mg / Kg, 0.5 mg / Kg, 0.7mg / Kg. Others are with embodiment 1.

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Abstract

This invention relates to a quick test reagent box and its application of nitrite composed of a reaction post, colorimetric cylinder, 1-naphthol, sulfanilic acid hydrochloric acid solution, potassium ferrocyanide, zine acetate, borax saturated solution and a comparison card. The test method includes: preparing a sample process fluid to be processed in chromogenic reaction to compare with the comparison card and determine the content of nitrite in the sample to judge if it has exceeded the target by transformation, which can semiquantitatively test nitrite in foodstuff and the lowest detection limit is 0.1mg / kg.

Description

technical field [0001] The invention belongs to a kit for rapid determination and detection of nitrite, in particular to a method and device for rapid determination of nitrite content in food. Background technique [0002] Nitrite mainly refers to sodium nitrite and potassium nitrite. It is a white opaque crystal chemical product with a shape very similar to table salt. Nitrite is a highly toxic substance. Adults can be poisoned if they ingest 0.2-0.5 grams. 3 grams can be lethal. Nitrite is also a carcinogen. According to research, esophageal cancer is positively correlated with the amount of nitrite ingested by patients. The carcinogenic mechanism of nitrite is: nitrite and secondary amine in food , tertiary amines and amides react to generate strong carcinogen N-nitrosamines. Nitrosamines can also enter the fetus through the placenta and have teratogenic effects on the fetus. Infants under 6 months are particularly sensitive to nitrite. Clinically, infants suffering fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/25
Inventor 王硕崔小军
Owner TIANJIN UNIV OF SCI & TECH
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