微萃取技术在水中土霉味化合物检测的应用

土霉味是国内外饮用水处理中最常见的问题之一,它通常与微生物活动有关。虽然土霉味化合物的浓度非常低(ng/L),但仍然达到了人类的感知阈值。因此为了检测这些低浓度的土霉味化合物就必须采用高灵敏度、高选择性的方法进行富集处理。本文综述了吸附微萃取、液相微萃取等微萃取技术在水中土霉味化合物检测的研究进展,为提高水中土霉味化合物检测提供借鉴。微萃取效率主要受萃取纤维的种类、萃取模式、添加无机盐的浓度、萃取温度和萃取时间等因素的影响。微萃取是最近发展起来的一种新型样品前处理技术,该方法操作简单、成本低、富集效率高、所需有机溶剂用量极少,是一种环境友好的萃取新技术,可与气相色谱、液相色谱等仪器联用。

Application of microextraction in the determination of musty compounds in water

The musty or earthy odor is one of the most common problems in domestic and foreign drinking water which is usually associated with microbial activity. The concentration of the soil musty compound is very low (ng/L), but it still reaches the perception threshold of human. In order to detect the very low concentrations of musty compounds, the pretreatment methods must be highly sensitive and selective. In this paper, the progress of microextraction technology including solid phase microextraction and liquid phase microextraction were reviewed, which can be used as references for improving the detection of musty compounds in water. The extraction efficiency is mainly affected by the kinds of extraction fiber, extraction mode, concentration of inorganic salts, extraction temperature and extraction time. Microextraction has been developed rapidly as a new sample pretreatment technique. This method has the advantages of easy operation, low cost, high efficiency and low consumption of organic solvent, which is a kind of environmental friendly extraction technology and can couple with gas chromatography and liquid chromatography for application.