溴酸钾氧化吡口罗红G催化动力学光度法测定痕量NO-2  

Catalytic Kinetic Spectrophotometric Determination of Trace Nitrite Based on the Oxidization of Pyronine G by Potassium Bromate

作　　者：李慧芝[1,2] 孔伟 崔丽君[1,2] 杨春霞 张巍[1,2] 

机构地区：[1]山东建材学院应化系 [2]山东化工研究院

出　　处：《分析科学学报》1997年第1期63-65,共3页Journal of Analytical Science

摘　　要：研究了在磷酸介质中亚硝酸根催化溴酸钾氧化吡口罗红Ｇ而使其褪色，建立了催化动力学光度法测定痕量亚硝酸根的新方法，测定范围为０．２～２０μｇ／ｍＬ，检出限为０．２ｎｇ／ｍＬ。In this paper, a catalytic kinetic spectrophotometric method is proposed for determining trace amounts of nitrite. The method is based on oxidization decoloration of pyronine G by potassium bromate in phosphoric acid medium catalysed by nitrite. The range of determination is 0.2-20ng/mL for nitrite with the detection limit of 0.2ng/mL. The method has been used to determine trace nitrite in water and food samples with satisfactory results.

关 键 词：吡罗红G 催化光度法 溴酸钾 亚硝酸根 二氧化氮 

分 类 号：O613.61[理学—无机化学] O657.3[理学—化学]