Baggiani Claudio, Anfossi Laura, Giovannoli Cristina
Laboratory of Bioanalytical Chemistry, Department of Analytical Chemistry, University of Torino, Italy.
Anal Chim Acta. 2007 May 15;591(1):29-39. doi: 10.1016/j.aca.2007.01.056. Epub 2007 Jan 26.
Food contamination from natural or anthropogenic sources poses severe risks to human health. It is now largely accepted that continuous exposure to low doses of toxic chemicals can be related to several chronic diseases, including some type of cancer and serious hormonal dysfunctions. Contemporary analytical methods have the sensitivity required for contamination detection and quantification, but direct application of these methods on food samples can be rarely performed. In fact, the matrix introduces severe disturbances, and analysis can be performed only after some clean-up and preconcentration steps. Current sample pre-treatment methods, mostly based on the solid phase extraction technique, are very fast and inexpensive but show a lack of selectivity, while methods based on immunoaffinity extraction are very selective but expensive and not suitable for harsh environments. Thus, inexpensive, rapid and selective clean-up methods, relaying on "intelligent" materials are needed. Recent years have seen a significant increase of the "molecularly imprinted solid phase extraction" (MISPE) technique in the food contaminant analysis. In fact, this technique seems to be particularly suitable for extractive applications where analyte selectivity in the presence of very complex and structured matrices represents the main problem. In this review, several applications of MISPE in food contamination analysis will be discussed, with particular emphasis on the extraction of pesticides, drugs residua, mycotoxins and environmental contaminants.
来自天然或人为来源的食品污染对人类健康构成严重风险。现在人们普遍认为,持续接触低剂量有毒化学物质可能与多种慢性疾病有关,包括某些类型的癌症和严重的激素功能紊乱。当代分析方法具备污染物检测和定量所需的灵敏度,但这些方法很少能直接应用于食品样本。事实上,样本基质会带来严重干扰,只有经过一些净化和预浓缩步骤后才能进行分析。当前的样本预处理方法大多基于固相萃取技术,速度快且成本低,但缺乏选择性;而基于免疫亲和萃取的方法选择性很强,但成本高且不适用于恶劣环境。因此,需要基于“智能”材料的廉价、快速且具有选择性的净化方法。近年来,“分子印迹固相萃取”(MISPE)技术在食品污染物分析中的应用显著增加。事实上,这项技术似乎特别适用于萃取应用,在这类应用中,在非常复杂且结构化的基质存在下对分析物的选择性是主要问题。在这篇综述中,将讨论MISPE在食品污染分析中的几种应用,尤其着重于农药、药物残留、霉菌毒素和环境污染物的萃取。
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