Authors: Rainsberg, Matthew R.; de Harrington, Peter B.

Source: Applied Spectroscopy, Volume 59, Issue 6, Pages 120A-138A and 707-851 (June 2005) , pp. 754-762(9)

Publisher: Society for Applied Spectroscopy

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 μg mL⁻¹, respectively.

Keywords: DIFFERENTIAL MOBILITY SPECTROMETRY; DMS; SOLIDPHASE MICROEXTRACTION; SPME; FIELD ASYMMETRIC WAVEFORM ION MOBILITY SPECTROMETR; FAIMS; BENZENE; TOLUENE; M-XYLENE

Document Type: Research article

DOI: http://dx.doi.org/10.1366/0003702054280630

Affiliations: 1: Ohio University, Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry, Clippinger Labs, Athens, Ohio 45701-2979

Publication date: 2005-06-01

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