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Analyst ; 128(9): 1150-6, 2003 Sep.
Article in English | MEDLINE | ID: mdl-14529022

ABSTRACT

A universal temperature controlled membrane interface (TCMI) has been constructed for hollow-fibre membranes. The membrane temperature is controllable in the range -70 to 250 degrees C using an electric heater and a flow of cooled nitrogen or helium gas. Volatile and semi-volatile organic compounds may be detected either by continuous diffusion across the membrane or by in-membrane pre-concentration followed by thermal desorption into the detector. The TCMI interface is demonstrated in combination with mass spectrometry and GC-MS, for the determination of VOCs and SVOCs in aqueous and air samples and for the on-line monitoring of a bioreactor.


Subject(s)
Flow Injection Analysis/instrumentation , Gas Chromatography-Mass Spectrometry/methods , Membranes, Artificial , Organic Chemicals/analysis , Temperature , Flow Injection Analysis/methods
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