90520 Nitrite Test Paper

Estimated delivery : 30 Days; MOQ : 10 Box (1 Box = 100 Tests)
Model Number : 90520
Test Range : 0.01-0.03-0.05-0.1-0.2-0.3-0.4-0.5mg/L

Product Description
Introduction
Nitrite is a highly toxic substance that can oxidize ferrous ions in hemoglobin into ferric ions, thereby making it lose its ability to bind oxygen, hindering the transport of oxygen in the body, causing acute poisoning in the human body, and causing life-threatening conditions. Nitrite can cause oxidative damage to vitamin A and hinder the conversion of carotene into vitamin A, resulting in vitamin A deficiency in the human body. At the same time, nitrite that enters the stomach and intestines can easily be converted into carcinogenic nitrosamines when it encounters amines. Animal experiments that have been conducted have confirmed that nitrosamines are highly carcinogenic. Because the toxicity of nitrite seriously endangers health, and the ecological environment on which humans depend for survival is polluted to varying degrees, soil, water quality, vegetables, etc. have been found to contain different amounts of nitrite. Therefore, it is of great significance to accurately and quickly measure the content of nitrite. In the food industry, due to illegal additions, the phenomenon of nitrite exceeding the standard is common.

Principle
Nitrite in water is diazotized with p-aminophenylsulfonamide, and then coupled with N-(1-naphthyl)-ethylenediamine to generate a purple-red azo dye for colorimetric quantification