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A sensitive and portable deep-UV absorbance detector with a microliter gas cell compatible with micro GC

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Show simple item record Khan, Sulaiman Newport, David Le Calvé, Stéphane 2021-03-31T09:44:34Z 2021-03-31T09:44:34Z 2021
dc.description peer-reviewed en_US
dc.description.abstract Deep-UV absorption spectrometry for detection of toxic airborne gases, for instance, Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) has drawn considerable attention owing to its high sensitivity and reliability. However, the development of a deep-UV absorbance detector having good sensitivity, portability, and a low-volume gas cell with applicability for a micro Gas Chromatography (µGC) is challenging. Herein we present a novel, self-referenced, and portable deep-UV absorbance detector with a microliter (275 µL) gas cell having minimal dead volume. It has excellent compatibility with µGC for detection of individual BTEX components in a mixed sample at a sub-ppm level. The design consists of the latest, portable, and cost-effective optical and electronic components, i.e., deep-UV LED, hollow-core waveguide, and photodiodes. The detector directly measures the absorbance values in volts using an integrated circuit with a log-ratio amplifier. The prototype was tested with direct injection of toluene-N2 (1.5 ppm to 50 ppm) and good linearity (R2 = 0.99) with a limit of detection of 196 ppb was obtained. The absorbance detector with µGC setup was tested with a BTEX mixture in N2 at different GC column temperatures. All the BTEX species were sequentially separated and detected with an individual peak for a concentration range of 2.5 ppm to 10 ppm. en_US
dc.language.iso eng en_US
dc.publisher MDPI en_US
dc.relation H2020- MSCA-ITN-2014 en_US
dc.relation.ispartofseries Chemosensors;9, 63
dc.subject gas sensor en_US
dc.subject VOCs en_US
dc.subject optical sensor en_US
dc.title A sensitive and portable deep-UV absorbance detector with a microliter gas cell compatible with micro GC en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.3390/chemosensors9040063
dc.contributor.sponsor Horizon 2020 en_US
dc.contributor.sponsor ERC
dc.relation.projectid 643095 en_US
dc.relation.projectid 687014 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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