多环芳烃的样品前处理技术研究进展

Research progress on sample pretreatment techniques for polycyclic aromatic hydrocarbons

多环芳烃(PAHs)是一类致癌、致畸、致突变的持久性有机物污染物,广泛存在于大气、水、土壤和生物等介质中.由于PAHs基体复杂并且含量很低,所以样品的净化和富集尤为重要.本文综述了近5年来国内外有关PAHs的样品前处理技术和方法的基本原理和代表性应用,包括液相微萃取、分散液液微萃取、固相微萃取、搅拌子吸附萃取、微耗损固相微萃取、分散固相微萃取法,比较了各方法的优缺点,并对PAHs的样品前处理技术的发展进行了展望.

Polycyclic aromatic hydrocarbons（ PAHs） are a group of persistent organic pollutants known for their carcinogenetic and mutagenic properties. PAHs ubiquitously exist in atmosphere,water,soil and organisms. Due to the complexity of matrix and low content of PAHs,high efficiency clean-up and enrichment procedures are urgently required. In this review,the basic principles and typical applications of some common sample pretreatment techniques for PAHs over the last 5 years are summarized and compared,including liquid phase microextraction, dispersive liquid-liquid microextraction,solid phase microextraction,stir bar sorptive extraction,negligible depletion solid phase microextraction, dispersive solid phase microextraction, to improve the sensitivity and efficiency of analytical methods. Moreover,the future outlook of sample pretreatment techniques for PAHs is also presented.