水中总氮测定方法的研究进展

近年来,总氮作为水体环境质量的重要指标之一,受到越来越多的重视。总结了近年来水中总氮的测定方法,并介绍了各种方法的原理、检测特点及应用前景。总结分析表明,紫外分光光度法仍是目前国内常用的水中总氮测定方法;高温氧化-化学发光检测法适用于污染较重的高浓度总氮样品的测定;离子色谱法能同时测定水中多种阴离子,可满足多样化测定的要求;气相分子吸收光谱法、连续流动分析法在水中总氮测定方面发展迅速,受到广泛关注。

Progress in determination of total nitrogen in water

In recent years,total nitrogen has been received more and more attention as one of the important indicators of water quality. In this paper,the methods for the determination of total nitrogen in water are reviewed. In addition,the principle,detection characteristics and application prospects of these methods are introduced. The results show that the spectrophotometry is a commonly used measurement method in China. The high-temperature oxidation-chemiluminescence detection method is suitable for the determination of high-concentration total nitrogen samples with heavy pollution. Ion chromatography can simultaneously measure various kinds of anions in water,meeting the requirements of diversified determination. Gas phase molecular absorption spectroscopy method and continuous flow injection method have developed rapidly recently,which also received extensive attention.