キャニスターを用いる質量比混合法による低濃度揮発性有機化合物校正用ガスの調製法

概要

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Nine volatile organic compounds (VOCs) (vinyl chloride, 1,3-butadiene, acrylonitrile, dichloromethane, chloroform, 1,2-dichloroethane, benzene, trichloroethylene, tetrachloroethylene) mixed calibration gases at the ppt level were prepared by gravimetric dilution from commercial VOC calibration gas (100 ppb). Ordinaly canisters (6 1) were used as diluting vessels. The uncertainty of the prepared 10 ppt calibration gas was about 3.8% including the uncertainty of the source gas. Diluted gases were analyzed by GC/MS with a three-stage preconcentrator. The relations between the caliculated (10 ppt to 100 ppb) and analycical values of GC/MS measurements showed good linearity (r^2 = 0.9972 〜 0.9999) for all nine VOCs.
社団法人日本分析化学会の論文
2000-08-05