The method was based on the catalytic effect of nitrite ion on the oxidation fading reaction of methyl orange and bright green with potassium bromate as oxidant in phosphoric acid medium.
In this paper, two rapid detection methods for carbamide in milk, namely p-dimethylaminobezaldehyde method and Nitrite-Griess method, were developed.
建立了对二甲氨基苯甲醛法和亚硝酸盐——格里斯试剂法两种对牛奶中掺入的尿素的快速检测方法。
3
A new spectrophotometric method for the determination of trace nitrite was studied. The method is based on the diazo - reaction of methylene violet with nitrite in hydrochloric acid medium.