title: Quartz crystal microbalance sensor array for the detection of volatile organic compounds.
abstract: A sensor array system consisting of five quartz crystal microbalance (QCM) sensors (four for measuring and one for reference) and an artificial neural network (ANN) method is presented for on-line detection of volatile organic compounds. Three ionic liquids, 1-butyl-3-methylimidazolium chloride (C(4)mimCl), 1-butyl-3-methylimidazolium hexafluorophosphate (C(4)mimPF(6)), 1-dedocyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (C(4)mimNTf(2)), and silicone oil II, which is widely used as gas chromatographic stationary phase, have been selected as sensitive coatings on the quartz surface allowing the sensor array effective to identify chemical vapors, such as toluene, ethanol, acetone and dichloromethane. The success rate for the qualitative recognition reached 100%. Quantitative analysis has also been investigated, within the concentration range of 0.6-6.1 mg/L for toluene, 0.9-7.5 mg/L for ethanol, 2.8-117 mg/L for dichloromethane, and 0.7-38 mg/L for acetone, with a prediction error lower than 8%.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China.
authors.forename: Xiuming
authors.initials: X
authors.lastname: Xu
authors.forename: Huaiwen
authors.initials: H
authors.lastname: Cang
authors.forename: Changzhi
authors.initials: C
authors.lastname: Li
authors.forename: Zongbao K
authors.initials: ZK
authors.lastname: Zhao
authors.forename: Haiyang
authors.initials: H
authors.lastname: Li
mesh_terms: D000096:Acetone / Q000032:analysis; D000431:Ethanol / Q000032:analysis; D052578:Ionic Liquids; D008752:Methylene Chloride / Q000032:analysis; D055617:Micro-Electrical-Mechanical Systems; D014050:Toluene / Q000032:analysis; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D052578:Ionic Liquids; D055549:Volatile Organic Compounds; D000096:Acetone; D014050:Toluene; D000431:Ethanol; D008752:Methylene Chloride