期刊论文

Yuan, YL

中文

光谱学与光谱分析

1000-0593

2002

22

5

806-808

10.3321/j.issn:1000-0593.2002.05.030

衡阳市科委资助课题 编号 :2 0 0 2 0 1 5

本校为第一且通讯机构

用镉柱将NO_3~-还原为NO_2~-，利用在磷酸介质中NO_2~-对溴酸钾氧化亚甲蓝这一褪色反应具有强烈的催化作用而建立了同时测定痕量硝酸盐和亚硝酸盐的新方法。本方法简便、快速、灵敏，对亚硝酸盐和硝酸盐测定的线性范围分别为0～200 μg·L~(-1)和0.003～310 μg·L~(-1)，用于测定各种水样中痕量NO_2~-和NO_3~-的含量均获得满意结果。

Nitrate and nitrite is one of important physical and chemical index in the analysis of environmental samples. A new catalytic spectrophotometric method for the determination of nitrate and nitrite has been established based on the catalytic action of nitrite on the oxidative fading reaction of methylene blue with potassium bromate in dilute phosphoric acid medium. The optimum experimental conditions were investigated in detail, including the selection of measuring wave-length and catalytic reactive medium, the dosage of indicator and pxidizer, ...