Influences of relative humidities and temperatures on the collection of C₂-C₅ aliphatic hydrocarbons with multi-bed (Tenax TA, Carbograph 1TD, Carboxen 1003) sorbent tube method

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• 作者：Steven Sai Hang Ho^a ; ^b ; Judith C. Chow^a ; ^b ; John G. Watson^a ; ^b ; Liqin Wang^a ; Linli Qu^c ; Wenting Dai^a ; Yu Huang^a ; ^{huangyu@ieecas.cn} ; Junji Cao^a ; ^b
• 关键词：VOCs ; Sorbent tube ; Thermal desorption ; Breakthrough ; Relative humidity
• 刊名：Atmospheric Environment
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：151
• 期：Complete
• 页码：45-51
• 全文大小：753 K
• 卷排序：151

文摘

Water vapor in the atmosphere affects VOCs sampling breakthrough with sorbent tube method. High relative humidities lead low collection efficiency for volatile C2-C5 aliphatic hydrocarbons. Dry-purge removes excessive water content but also causes loss of target analytes. Optimizes the tube temperature (∼5–10 °C above ambient temperature) in order to reduce water condensation during sampling.