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Reagent for detecting nitrite in food and nitrite detection method

A technology for nitrite and detection reagents, which is applied in the preparation of test samples, measurement of color/spectral characteristics, and material analysis by observing the influence of chemical indicators, etc., which can solve the problems of poor detection stability, large limitations, difficult nitrite content and other issues, to achieve the effect of improving stability, high stability and high accuracy

Inactive Publication Date: 2016-06-01
SHANDONG EMBER INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are some published detection methods for nitrite content, but all have great limitations. Generally, they can only detect foods without soluble pigments. For foods with colored juice after crushing, such as carrot pickles, due to the Influenced by pigment, it is difficult to quickly and accurately detect its nitrite content
[0005] The existing technology has the following defects: (1) large limitations, only samples without soluble pigments can be detected; (2) the minimum detection limit of nitrite content is high; (3) the accuracy of detection of nitrite content Not high; (4) Poor detection stability

Method used

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  • Reagent for detecting nitrite in food and nitrite detection method
  • Reagent for detecting nitrite in food and nitrite detection method
  • Reagent for detecting nitrite in food and nitrite detection method

Examples

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Effect test

Embodiment 1

[0030] Example 1 A detection reagent for nitrite in food without water-soluble pigments and a detection method for nitrite

[0031] 1. A detection reagent for nitrite in food without water-soluble pigments

[0032] The detection reagent for nitrite in food without water-soluble pigments, in parts by weight, raw materials include 58 parts of tartaric acid, 40 parts of anhydrous p-aminobenzenesulfonic acid, and 2 parts of naphthaleneethylenediamine hydrochloride;

[0033] The raw material is solid powder.

[0034] The preparation method of the nitrite detection reagent is as follows: weigh each raw material according to the formula, grind and mix them evenly, dissolve the mixed powder in distilled water according to the ratio of 1g / 10ml distilled water, and use 320-400Hz ultrasonic to speed up the dissolution. The liquid is the nitrite detection reagent.

[0035] , a detection method of nitrite in food without water-soluble pigment

[0036] Step 1. Make a color card

[0037]...

Embodiment 2

[0061] Example 2 A detection reagent for nitrite in food containing water-soluble pigments and a detection method for nitrite

[0062] 1. A detection reagent for nitrite in foods containing water-soluble pigments

[0063] The reagent for detecting nitrite in food containing water-soluble pigments, in parts by weight, raw materials include 59 parts of tartaric acid, 40 parts of anhydrous p-aminobenzenesulfonic acid, 2 parts of naphthaleneethylenediamine hydrochloride, 1 part of sodium citrate, 3 parts of sodium gluconate, 5 parts of ethylene glycol distearate, 6 parts of sodium molybdate;

[0064] The raw material is solid powder.

[0065] The preparation method of the nitrite detection reagent is as follows: weigh each raw material according to the formula, grind and mix them evenly, dissolve the mixed powder in distilled water according to the ratio of 1g / 10ml distilled water, and use 320MHz ultrasonic treatment to speed up the dissolution and dissolve The final liquid is the...

Embodiment 3

[0083] Example 3 A detection reagent for nitrite in food containing water-soluble pigments and a detection method for nitrite

[0084] 1. A detection reagent for nitrite in foods containing water-soluble pigments

[0085] The detection reagent for nitrite in the food containing water-soluble pigments, in parts by weight, raw materials include 57 parts of tartaric acid, 42 parts of anhydrous p-aminobenzenesulfonic acid, 2.5 parts of naphthaleneethylenediamine hydrochloride, 1.8 parts of sodium citrate, 4 parts of sodium gluconate, 7 parts of ethylene glycol distearate, 6.3 parts of sodium molybdate;

[0086] The raw material is solid powder.

[0087] The preparation method of the nitrite detection reagent is as follows: weigh each raw material according to the formula, grind and mix them evenly, dissolve the mixed powder with distilled water according to the ratio of 1g / 10ml distilled water, and use 360MHz ultrasonic treatment to speed up the dissolution and dissolve The fina...

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Abstract

The invention provides a reagent for detecting nitrite in a food. The reagent is applied to detection of nitrite in the food which does not contain a water soluble pigment and is prepared from, by weight, 58 parts of tartaric acid, 40 parts of anhydrous sulfonic acid and 2 parts of N-ethylenediamine dihydrochloride. The nitrite content is detected by adopting the detection method, the accuracy is 97.6-99.9%, relative standard deviation is 1.2-1.7%, the accuracy is high, and the stability is good. The detection limit of the nitrite content detected by adopting the detection method is 0.01 ppm.

Description

technical field [0001] The invention relates to a reagent for detecting nitrite in food and a method for detecting nitrite, belonging to the technical field of chemical analysis and detection. Background technique [0002] Nitrite is generally contained in meat products and pickled products. Nitrite is a strong oxidant. After entering the human body, it can oxidize low iron hemoglobin into methemoglobin, causing hemoglobin to lose its ability to carry oxygen, resulting in tissue hypoxia and damage to the body. Peripheral blood vessels are dilated. Acute nitrite poisoning is more common when it is taken as table salt by mistake. The main feature of poisoning is cyanosis caused by tissue hypoxia, such as cyanosis of lips, tongue tip, and fingertips; in severe cases, cyanosis of the conjunctiva, face and body skin, dizziness, headache, fatigue, rapid heartbeat, lethargy or irritability, dyspnea, nausea Vomiting, abdominal pain and diarrhea; in severe cases, coma, convulsions,...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/78G01N1/28
CPCG01N1/28G01N21/31G01N21/78
Inventor 贾建领左其锦张蕙兰肖丽苏红英张惠刚刘健
Owner SHANDONG EMBER INSTR