摘要
基于在稀磷酸介质中亚硝酸根对溴酸钾氧化百里酚蓝褪色反应的催化效应 ,建立了一种测定痕量亚硝酸根的催化光度法。该方法测定亚硝酸根的线性范围为 0～ 6 .5 μg/ 2 5ml,灵敏度为 0 .6 7ng·ml- 1。用于新鲜果蔬样品中痕量亚硝酸根的测定 。
Based on the catalytic effect of nitrite on the color fading reaction of oxidation of thymol blue by potassium bromate in dilute phosphoric acid solution, a catalytic kinetic photometric method for the determination of trace amounts of nitrite was developed. The linear range for nitrite was found to be 0～6.5μg/25ml and the limit of detection to be 0.67ng·ml -1. The method has been applied to the determination of nitrite in several fresh fruit and vegetable samples with satisfactory results.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2002年第9期454-455,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
