摘要
研究了在磷酸介质中，亚硝酸根对溴酸钾氧化1-（2-吡啶偶氮）-2-萘酚（PAN）的催化作用的反应条件，建立了测定亚硝酸根的动力学光度法。试验结果线性范围为0．2～8．0μg／25mL，检出限为5．7μg·L^-1，用于样品中亚硝酸根的测定，测定结果的RSD小于2．5％，回收率在101％～104％之间。
Based on the catalytic effect of trace amounts of nitrite on the oxidation de-coloration reaction between potassium bromate and PAN in dilute phosphoric acid medium, a new method for the determination of trace amounts of nitrite was established. The linear rang for nitrite is 0. 2--8. 0μg/25 mL, and the detection limit is 5. 7μg· L^-1. The proposed method has been applied to the determination of traces of nitrite in water and fruit samples giving RSD＇s less than 2. 5%, and recoveries in the range of 101%-104%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2006年第8期656-657,659,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
盐城工学院优秀青年资金课题(YQ2001003)
关键词
动力学催化法
亚硝酸根
溴酸钾
PAN
Catalytic kinetic photometry
Nitrite
Potassium bromate
PAN
