Determination of Halogenated Hydrocarbons in Coatings by Gas Chromatography-Mass Spectrometry and Environmental Test Chamber
The determination method of 11 halogenated hydrocarbons in coatings was established by using an environmental test chamber combined with gas chromatography-mass spectrometry.The adsorbent Tenax TA was found to be less effective for capturing dichloromethane,dichloroethane,and trichloroethane,with these compounds exhibiting penetration rates exceeding 40%.In contrast,the Carbopack B/CarbosieveTM S-Ⅲ adsorbent demonstrated superior performance in mitigating the penetration of halogenated hydrocarbons.The developed method proved to be precise,reproducible,and stable,with a recovery rate ranging from 96%to 121%and a relative standard deviation(RSD)of less than 10%.Application of this method to coatings revealed that solvent-based coatings released a greater variety of halogenated hydrocarbons compared to water-based coatings.Dichloromethane and dichloroethane were frequently detected across various coatings,whereas trichloroethylene and tetrachloroethylene were less prevalent.The multiple halogenated hydrocarbon organics testing techniques established in this study can support the quality control of halogenated hydrocarbons in coating products,especially imported coatings.
coatingshalogenated hydrocarbonsenvironmental test chambergas chromatography-mass spectrometryadsorbent
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