基于亚硝化反应的极谱法测定亚硝酸根的研究  

Determination of Nitrite by Polarography Based on Nitrosation Reaction

作　　者：王亚林[1,2] 方能虎[1,2] 康敬万[3] 高锦章[3] 

机构地区：[1]淮北煤炭师范学院化学系 [2]上海交通大学化学化工学院 [3]西北师范大学化学系

出　　处：《分析测试学报》1999年第3期53-55,共3页Journal of Instrumental Analysis

基　　金：煤炭青年科学基金

摘　　要：提出了一种基于在酸性介质中甲基紫与亚硝酸根发生亚硝化反应，极谱法测定亚硝酸根的新体系。亚硝化产物在－０．７５Ｖ（ｖｓ．ＳＣＥ）处２．５次微分波的波高与ＮＯ２－的质量浓度在２．０×１０－３～２．０×１０－２ｍｇ／Ｌ（Ｓ＝４μＡ），４．０×１０－３～１．６×１０－１ｍｇ／Ｌ（Ｓ＝０．０２ｍＡ）范围内成直线关系。该法重复性好，且大多数常见的阴、阳离子不干扰，用于污水中痕量ＮＯ２－的测定，结果满意。A new method based on nitrosation reaction of methyl violet (MV) with nitrite in acid medium has been developed for the determination of nitrite by single _ sweep polarography. The height of 2.5 order derivative polarographic wave of nitrosation reaction product is linear with the concentration of nitrite at -0.75 V(vs.SCE) in the range of 2.010-32.010-2 mg/L (S=4 A), 4.010-31.610-1 mg/L (S=0.02 mA). Most common anions and cations have no interference. This procedure was successfully applied to the determination of trace amount of nitrite in waste water.

关 键 词：亚硝化反应 甲基紫 亚硝酸根 示波极谱法 测定 

分 类 号：O613.61[理学—无机化学] X132[理学—化学]