Selective Detector for Gas Chromatography Based on Adduct-Modulated Semiconductor Photoluminescence
作者： George C. Lisensky , Gerald J. Meyer , Arthur B. Ellis
DOI: 10.1021/AC00173A020
关键词: Chemistry 、 Photoluminescence 、 Detector 、 Thermal conductivity detector 、 Semiconductor detector 、 Gas chromatography 、 Analytical chemistry 、 Semiconductor 、 Adduct 、 Lewis acids and bases
摘要: Abstract : The photoluminescence (PL) of semiconducting n-CdS, Te-doped CdS, and CdSe can be used as the basis for a non destructive, selective detector gas chromatography. When placed in series with thermal conductivity (TCD) chromatograph, semiconductor responds parallel TCD to species that engage adduct formation: PL intensity is enhanced by Lewis bases like amines quenched acids such carboxylic acids, relative observed He carrier gas. Gases interact more weakly surface hydrocarbons are not detected PL-based detector. For n-CdS:Te detector, linear response regimes detection limits have been determined being approx. 0.1-3.0 micro-g o.1 n-butylamine 0.2-1.5 mg 0.2 acetic acid.
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