Green methods for the determination of nitrite in water samples based on a novel diazo coupling reaction

Green Processing and Synthesis

article

Safwan M. Fraihat¹ 

[1] Department of Chemistry, College of Science, Aljouf University

关键词: 5-nitroimidazoles;    green;    nitrite;    pyrogallol (PG);    spectrophotometric;    water;   

DOI  :  10.1515/gps-2016-0005

来源: De Gruyter

【 摘 要 】

Green, sensitive and selective spectrophotometric methods were developed for the determination of nitrite in water samples. The methods (A, B and C) are based on the reduction of 5-nitroimidazoles; metronidazole (MTL), secnidazole (SCL) and tinidazole (TNL), respectively, followed by diazotization using nitrite in acidic medium, then coupling with pyrogallol (PG). The amount of nitrite was determined by measuring the absorbance of the colored product at 385 nm. The new methods were linear in the ranges of 2.5–30 μgml −1 , with detection limits of 1.4 μgml −1 .

【 授权许可】

CC BY