title: Thermal desorption solid-phase microextraction inlet for differential mobility spectrometry.
abstract: A splitless thermal desorber unit that interfaces a differential mobility spectrometry (DMS) sensor has been devised. This device was characterized by the detection of benzene, toluene, and xylene (BTX) in water. The detection of BTX in water is important for environmental monitoring, and ion mobility measurements are traditionally difficult for hydrocarbons in water because water competes for charge and quenches the hydrocarbon signals. This paper reports the use of a DMS with a photoionization source that is directly coupled to a solid-phase microextraction (SPME) desorber. The separation and detection capabilities of the DMS were demonstrated using BTX components. Detection limits for benzene, toluene, and m-xylene were 75, 50, and 5 microg mL(-1), respectively.
authors.affiliation: Ohio University, Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry, Clippinger Labs, Athens, Ohio 45701-2979, USA.
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Rainsberg
authors.forename: Peter B
authors.initials: PB
authors.lastname: de Harrington
mesh_terms: D000327:Adsorption; D001554:Benzene / Q000032:analysis* / Q000737:chemistry; D045424:Complex Mixtures / Q000032:analysis / Q000737:chemistry; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods; D008832:Microchemistry / Q000295:instrumentation* / Q000379:methods; D044367:Phase Transition; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods*; D013696:Temperature; D014050:Toluene / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*; D014992:Xylenes / Q000032:analysis* / Q000737:chemistry
chemical_list: D045424:Complex Mixtures; D014874:Water Pollutants, Chemical; D014992:Xylenes; D014050:Toluene; D001554:Benzene