金属检测中新型前处理技术研究进展及应用

精准检测环境和食品中金属含量对环境保护和人体健康至关重要.样品的准备环节是造成样品损失和二次污染的关键步骤, 因此合适的前处理方法可以提高金属分析的选择性和灵敏度.从液相萃取和非液相萃取新技术两方面综述了浊点萃取、离子液体、超分子溶剂-分散液液微萃取、顶空固相微萃取技术、超临界流体萃取特点及在复杂样品前处理中的应用和研究进展, 并对其未来发展方向进行了展望.

Progress in Application of Pretreatment Methods in Metal Ion Analyte

Effective detection of metals in the environment and food is crucial to environmental protection and human health.Sample preparation is considered a key step in the whole analytical protocol since, besides being considered time-consuming, it is one of the most critical steps in terms of analyte losses and contaminations.Thus for improving the selectivity and sensitivity of metal analyte, extraction and clean-up steps are required.In this paper, the characteristics of new methods in metal ion pretreatment, such as cloud phase extraction, ionic liquids, dispersive liquid-liquid microextraction, headspace-solid phase microextraction, supercritical fluid extraction, and the advances in applications of which in the preparation of complex samples are summarized, and the direction for future development is proposed.