预富集技术在原子吸收光谱环境分析中的应用

原子吸收光谱法是分析环境水样中金属离子含量的有效方法之一。在测定时往往需要对样品进行前处理,然后再进行测定。文章介绍了近些年较新的一些分离富集技术在原子吸收光谱分析环境中金属离子时的应用,分析了离子交换树脂在样品中金属离子富集分离过程中的研究近况,评述了固相萃取、析相微萃取、单滴液滴微萃取、分散液液微萃取、离子液体萃取、浊点萃取等多种萃取方式在样品预富集中的应用进展,综述了活性炭、纳米粒子、淀粉、分子筛等吸附剂在富集环境水样中金属元素的应用现状,同时还对在线富集技术与流动注射分析技术联用在金属元素分析中的应用进展进行了评述。

Application of Pre-concentration in Atomic Absorption Spectrometry for Environmental Analysis

This paper reviewed newly developed separation and enrichment techniques regarding sample treatment for atomic absorption spectrometry.Of them ion exchange resin for metal-enriching,solid phase extraction,microsphere phase separation,single drop droplet micro-extraction,dispersed liquid micro-extraction,ionic liquid extraction and cloud point extraction were summarized and discussed in terms of their application advances.Also mentioned in this paper were the advances in us ing activated carbon,nano-particles,starch and molecular sieve for metal enrichment in water samples,as well as the technique for flow injection analysis incorporated with online enrichment.