Journal
EUROSENSORS 2015
Volume 120, Issue -, Pages 1042-1045Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.proeng.2015.08.719
Keywords
VOC detection; benzene; low concentration; pre-concentrator; indoor air quality
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A method for the measurement of low gas concentrations is presented. The method was developed for detection of Volatile Organic Compounds (VOCs) in indoor air quality applications and tested with benzene, a carcinogenic VOC with no safe exposure limit value. Using metal organic framework materials, gas pre-concentration devices for benzene were prepared on ceramic micro hotplates and characterized. Two MOF materials (HKUST-1 and MIL-53) were tested. Both showed good pre-concentrator performance concerning adsorption and desorption of the target gas. A significant temporary decrease of the benzene concentration in the sampling phase and a corresponding increase in the desorption phase were detected using a mass spectrometer. The MOF pre-concentrators were also tested in combination with a semiconductor gas sensor resulting in a significant increase in the sensor response in the desorption phase. (C) 2015 The Authors. Published by Elsevier Ltd.
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