Determination of Volatile Sulfur Compounds by MIL-53(Al)Preconcentration and Gas Chromatography AITranslate

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Chinese Library Classification Number:X831[环境科学与工程];O657.7[环境科学与工程—环境工程]

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Volatile sulfur compounds(VSCs)are major contributors to odor pollution and acid rain formation,making accurate monitoring of atmospheric VSCs levels essential for controlling anthropogenic emissions.In this study,we developed a method for the enrichment and quantification of trace VSCs in actual gas using MIL-53(Al)as preconcentration adsorbent coupled with gas chromatography(GC).We investigated and optimized several factors affecting the efficiency of the method,including adsorbent amount,adsorption temperature,sampling volume,gas flow rate,and desorption temperature.Under optimal experimental conditions,the method demonstrated good linearity in the range of 0.10–26.67 nmol/mol(R²≥0.9968),with low detection limits ranging from 0.03 to 0.11 nmol/mol for ten VSCs.The established method was successfully applied to the enrichment and detection of trace VSCs in four complex actual gas samples,achieving satisfactory recoveries between 82.7%and 109.3%,and good precision with relative standard deviations(RSDs)≤7.12%.This study presents a simple and effective approach for the simultaneous detection of VSCs,offering great potential for VSCs monitoring.