联用技术在砷形态分析中的研究进展

摘要：目前用于元素砷的形态分析技术主要是色谱与原子光谱、质谱等的联用，最常用的是HPLC与ICP—OES、ICP—MS的联用，方法准确可靠，灵敏度高，但是不能提供砷化合物的分子结构信息。因此以色谱一电喷雾质谱（ESI—MS）的联用作为定性分析的主要手段，但是ESI—MS灵敏度低，易受基体干扰，因此需要复杂的前处理技术。

Research Progress in the Speciation of Arsenic with Hyphenated Techniques

Currently the main analysis techniques for arsenic speciation were the combination of chromatograph with atomic spectrum and mass spectrum, especially the combination of HPLC with ICP-OES or ICP-MS. The methods were accurate and reliable and had high sensitivity. But they can not provide the structural information of arsenic compounds. So the combination of chromatograph with ESI-MS was used as the main method for qualitative analysis. The insufficient sensitivity and vulnerability to matrix interference of ESI-MS can be overcome by the complex pretreatment technique. In this article hyphenated techniques were evaluated with particular emphasis on interfaced separation with element-selective detection and identification of the arsenic compounds detected.