title: Needle-type extraction device for the purge and trap analysis of 23 volatile organic compounds in tap water.
abstract: We developed a rapid determination technique for trace volatile organic compounds (VOCs) in tap water by introducing a novel needle-type extraction device coupled to a purge-and-trap method. To extract a wide range of VOCs, a new extraction needle containing particles of divinylbenzene and activated carbon was developed in this study. During the active sampling of the headspace gas in a glass vial by the extraction needle, pure N2 gas was used for purging the aqueous sample. After the optimization of several experimental parameters, such as the addition of the salt and conditions of dry purging and desorption, the extraction performance of the device and method was evaluated for 23 VOCs that are typically found in tap water samples. The quantification limits of the method were 0.6 μg/L for 1,1-dichloroethylene and less than 0.5 μg/L for other VOCs, with good repeatability being confirmed for all the target compounds. Taking advantage of the excellent recovery of VOCs, the determination of VOCs in real tap water samples was carried out successfully. Because the developed method does not require sample heating and/or cryogenic focusing, simple and rapid analyses can be performed along with satisfactory sensitivity for typical tap water samples.
authors.affiliation: Department of Applied Chemistry, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan. Electronic address: iueta@yamanashi.ac.jp.
authors.forename: Ikuo
authors.initials: I
authors.lastname: Ueta
authors.forename: Nurhafizza Abd
authors.initials: NA
authors.lastname: Razak
authors.forename: Ayako
authors.initials: A
authors.lastname: Mizuguchi
authors.forename: Susumu
authors.initials: S
authors.lastname: Kawakubo
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Saito
authors.forename: Kiyokatsu
authors.initials: K
authors.lastname: Jinno
mesh_terms: D005591:Chemical Fractionation / Q000295:instrumentation* / Q000379:methods; D060766:Drinking Water / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D009339:Needles; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013696:Temperature; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000302:isolation & purification; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000302:isolation & purification
chemical_list: D060766:Drinking Water; D055549:Volatile Organic Compounds; D014874:Water Pollutants, Chemical
keywords: Needle-type extraction device; Purge-and-trap; Sample preparation; Volatile organic compounds