Needle-type extraction device for the purge and trap analysis of 23 volatile organic compounds in tap water.

摘要: We developed a rapid determination technique for trace volatile organic compounds (VOCs) in tap water by introducing novel needle-type extraction device coupled to purge-and-trap method. To extract wide range of VOCs, new needle containing particles divinylbenzene and activated carbon was this study. During the active sampling headspace gas glass vial needle, pure N2 used purging aqueous sample. After optimization several experimental parameters, such as addition salt conditions dry desorption, performance method evaluated 23 VOCs that are typically found samples. The quantification limits were 0.6 μg/L 1,1-dichloroethylene less than 0.5 other with good repeatability being confirmed all target compounds. Taking advantage excellent recovery real samples carried out successfully. Because does not require sample heating and/or cryogenic focusing, simple analyses can be performed along satisfactory sensitivity typical