环境水样中(NO_2)^-的催化光度法测定  

The Determination of the (NO_2)^- in the Water Sample by Catalytic Photometry

作　　者：马洁倩[1] 曹永林[1] 

机构地区：[1]镇江师范专科学校化学系,江苏镇江212003

出　　处：《常熟高专学报》2001年第4期47-49,共3页Journal of Changshu College

摘　　要：提出了催化褪色光度法测定痕量NO2 - 的新方法。此法是基于百里香酚蓝在H2 SO4 介质中被KBrO3氧化的反应受到痕量NO2 - 的催化。本法的检测限为 4 .6× 10 - 8g/mL ,测定范围为 2～12 μg/ 2A new catalytic fading spectrophotometric method for the determination of trace NO 2 - is descried.This method is based on the oxidation of Thymol blue by KBrO 3 in H 2SO 4 medium catalyzed by NO 2 -.The detection limit is 4.6×10 -8 g/mL,the determination range of NO 2 - is 2～12μg/25mL. The proposed method has been used for analysis of water sample,with satisfactory results.

关 键 词：溴酸钾 百里香酚蓝 亚硝酸根 环境监测 环境水样 催化褪色光度法 含量测定 

分 类 号：X832[环境科学与工程—环境工程]