溴酸钾-胭脂红酸催化光度法测定NO_2^-的研究  

Catalytic Spectrophotometic Determination of Trace Nitrite with Potassium Bromate-Carminic Acid

作　　者：高宗华[1] 柳仁民[2] 李蛟[2] 张小玲[1] 

机构地区：[1]陕西师范大学化学与材料科学学院,西安市710062 [2]聊城大学化学化工学院,山东省聊城市252059

出　　处：《光谱实验室》2003年第3期440-443,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：在 0 .4 mol/ L硫酸介质中亚硝酸根对溴酸钾氧化胭脂红酸的褪色反应的催化作用 ,建立了高灵敏测定痕量亚硝酸根的新方法。室温下方法的线性范围为 2— 5 0 ng/ m L,检出限为 0 .4 ng/ m L。利用该方法对几种河水水样进行测定 。A highly sensitive method for the determination of trace amounts of nitrite was established based on catalytic effect on the oxidation of carminic acid with bromate in acidic media.Under optimized conditions of 0.7×10 -2mol/L KBrO 3,1.8×10 -4mol/L carninic acid,0.4mol/L H 2SO 4 at 25℃,the detection limit for nitrite is 0.4ng/mL in the linear range of the determination of 2-50ng/mL.The method was used to determine trace nitrite in river water with satisfactory results.

关 键 词：溴酸钾 胭脂红酸 催化光度法 测定 亚硝酸根 河水 水质监测 

分 类 号：X832.02[环境科学与工程—环境工程]