title: Novel sample preparation technique with needle-type micro-extraction device for volatile organic compounds in indoor air samples.
abstract: A novel needle-type sample preparation device was developed for the effective preconcentration of volatile organic compounds (VOCs) in indoor air before gas chromatography-mass spectrometry (GC-MS) analysis. To develop a device for extracting a wide range of VOCs typically found in indoor air, several types of particulate sorbents were tested as the extraction medium in the needle-type extraction device. To determine the content of these VOCs, air samples were collected for 30min with the packed sorbent(s) in the extraction needle, and the extracted VOCs were thermally desorbed in a GC injection port by the direct insertion of the needle. A double-bed sorbent consisting of a needle packed with divinylbenzene and activated carbon particles exhibited excellent extraction and desorption performance and adequate extraction capacity for all the investigated VOCs. The results also clearly demonstrated that the proposed sample preparation method is a more rapid, simpler extraction/desorption technique than traditional sample preparation methods.
authors.affiliation: Department of Applied Chemistry, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan. iueta@yamanashi.ac.jp
authors.forename: Ikuo
authors.initials: I
authors.lastname: Ueta
authors.forename: Ayako
authors.initials: A
authors.lastname: Mizuguchi
authors.forename: Koji
authors.initials: K
authors.lastname: Fujimura
authors.forename: Susumu
authors.initials: S
authors.lastname: Kawakubo
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Saito
mesh_terms: D016902:Air Pollution, Indoor / Q000032:analysis*; D053000:Analytic Sample Preparation Methods / Q000295:instrumentation* / Q000379:methods; D002244:Carbon / Q000737:chemistry; D004867:Equipment Design; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D008689:Methacrylates / Q000737:chemistry; D008904:Miniaturization / Q000295:instrumentation*; D009339:Needles; D011108:Polymers / Q000737:chemistry; D052617:Solid Phase Microextraction / Q000295:instrumentation* / Q000379:methods; D014753:Vinyl Compounds / Q000737:chemistry; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D008689:Methacrylates; D011108:Polymers; D014753:Vinyl Compounds; D055549:Volatile Organic Compounds; C010514:tenax; D002244:Carbon; C004919:ethylene dimethacrylate; C004985:divinyl benzene