Detection agent for rapidly and quantitatively determining nitrite and detection method thereof

A technology for the quantitative determination of nitrite, applied in the measurement of color/spectral characteristics, material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, etc., to achieve good anti-interference ability and good application effect, the effect of improving safety and efficiency

Pending Publication Date: 2021-11-19
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the detection reagent formula is a difficult problem in the rapid detection of nitrite, which determines the sensitivity, accuracy and detection limit of nitrite detection.

Method used

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  • Detection agent for rapidly and quantitatively determining nitrite and detection method thereof
  • Detection agent for rapidly and quantitatively determining nitrite and detection method thereof
  • Detection agent for rapidly and quantitatively determining nitrite and detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A detection method for rapid quantitative determination of nitrite, the method is based on GB 5009.33-2016 detection, which uses succinic acid instead of concentrated hydrochloric acid, the concentration of succinic acid is 0.4mol / L, and the mass concentration of p-aminobenzenesulfonic acid is 9g / L, the mass concentration of naphthaleneethylenediamine hydrochloride is 0.1g / L, the volume ratio of diazo compound and coupling reagent is 4:1, (this is DS group).

Embodiment 2

[0048] A detection method for rapid quantitative determination of nitrite, the method is based on GB 5009.33-2016 for detection, it uses malic acid instead of concentrated hydrochloric acid, the concentration of malic acid is 0.6mol / L, and the mass concentration of p-aminoacetophenone is 7g / L The mass concentration of naphthaleneethylenediamine hydrochloride is 0.4g / L, and the volume ratio of diazo compound and coupling reagent is 3:1, (this is the DT group).

Embodiment 3

[0050] A rapid quantitative determination of nitrite detection method, the method is based on GB 5009.33-2016 for detection, it uses tartaric acid instead of concentrated hydrochloric acid, the concentration of tartaric acid is 0.6mol / L, the mass concentration of sulfonamide is 9g / L, naphthaleneethylenediamine hydrochloride The mass concentration is 0.4g / L, and the volume ratio of the diazo compound to the coupling reagent is 4:1 (this is the HA group).

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Abstract

The invention relates to the technical field of nitrite detection and particularly relates to a detection agent for rapidly and quantitatively determining nitrite and a detection method of the detection agent. The method is based on a GB method, and detection is carried out based on an ultraviolet and visible spectrophotometer. Organic acid is used as an acidic medium instead of concentrated hydrochloric acid in a GB method, and sulfanilamide, p-aminobenzene sulfonic acid or p-aminoacetophenone is used as a diazonium reagent. Compared with GB, succinic acid, malic acid and tartaric acid can effectively replace concentrated hydrochloric acid to serve as acid media, and safety is improved; the diazo-coupling reagent is mixed for use, so two-step reaction in a GB method can be replaced; 12% of triethylamine hydrochloride can be used as a catalyst of a DT group; the time for determining the nitrite in the DS group, the DT group and the HA group needs 15 min, 5 min and 6 min respectively, the time is saved by 5-15 min compared with 20 min of a GB method, and detection efficiency of the nitrite is improved; efficiency of the DT group and the HA group is higher than that of the DS group, and the DT group and the HA group can be used as a liquid type detection agent for rapidly and quantitatively determining nitrite.

Description

technical field [0001] The invention relates to the technical field of nitrite detection, in particular to a detection agent for rapid quantitative determination of nitrite and a detection method thereof. Background technique [0002] Nitrite mainly refers to sodium nitrite, which is similar in appearance and taste to table salt. Trace amounts of nitrite have potential medical effects in preventing acute gastric ulcer, inhibiting cardiovascular disease caused by oxidative stress, reducing red blood cell hemolysis, inhibiting red blood cell adhesion and other physiological functions. However, if the nitrite content exceeds the standard, it is harmful to humans. If the human body accumulates too much nitrite, it can cause acute kidney injury, secondary hyperparathyroidism, methemoglobinemia, formation of carcinogenic nitrosamines, and possible type 1 diabetes risks of. Existing clinical studies have shown that nitrous salt has a very serious impact on pregnant women and babi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/31G01N21/33
Inventor 左勇张晶杨建飞李琪黄玉立
Owner SICHUAN NORMAL UNIVERSITY
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