title: Zeolite-loaded poly(dimethylsiloxane) hybrid films for highly efficient thin-film microextraction of organic volatiles in water.
abstract: ZSM-5 zeolite-loaded poly(dimethylsiloxane) (PDMS) hybrid thin films were demonstrated for efficient thin-film microextraction (TFME) coupled with gas chromatography-mass spectrometry for analyzing organic volatiles in water. The extraction efficiency for a series of aliphatic alcohols and two aromatic compounds was significantly improved owing to the presence of ZSM-5 zeolites. The extraction efficiency of the hybrid films was increased in proportion to the content of ZSM-5 in the PDMS film, with 20wt% of ZSM-5 showing the best results. The 20wt% ZSM-5/PDMS hybrid film exhibited higher volatile organic content extraction compared with the single-component PDMS film or PDMS hybrid films containing other types of zeolite (e.g., SAPO-34). Limits of detection and limits of quantitation for individual analytes were in the range of 0.0034-0.049ppb and of 0.010-0.15 ppb, respectively. The effects of experimental parameters such as extraction time and temperature were optimized, and the molecular dispersion of the zeolites in/on the hybrid film matrix was confirmed with scanning electron microscopy and atomic force microscopy. Furthermore, the optimized hybrid film was preliminarily tested for the analysis of organic volatiles contained in commercially available soft drinks.
authors.affiliation: Graduate School of Environmental Engineering, The University of Kitakyushu, 1-1 Hibikino, Kitakyushu 808-0135, Japan.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.affiliation: Division of Community Oral Health Development, Kyushu Dental University, 2-6-1 Manazuru, Kitakyushu 803-8580, Japan.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Ansai
authors.affiliation: Graduate School of Environmental Engineering, The University of Kitakyushu, 1-1 Hibikino, Kitakyushu 808-0135, Japan. Electronic address: leesw@kitakyu-u.ac.jp.
authors.forename: Seung-Woo
authors.initials: SW
authors.lastname: Lee
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D016014:Linear Models; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D052617:Solid Phase Microextraction / Q000379:methods*; D055549:Volatile Organic Compounds / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D004129:Dimethylpolysiloxanes; D055549:Volatile Organic Compounds; D014874:Water Pollutants, Chemical; C570564:ZSM-5 zeolite; D017641:Zeolites; C013830:baysilon
keywords: Gas chromatography–mass spectrometry; Organic volatiles; Poly(dimethylsiloxane); Thin-film microextraction (TFME); ZSM-5