Determination of Free Toluene Diisocyanate in Paint by Gas Chromatography / 环境与健康杂志

Objective To establish a simple,rapid,accurate and sensitive method for determination of free toluene diisocyanate in paint.Method The samples were diluted by acetone and separated using GC,25%SE-30column.The contents of free toluene diisocyanate in the samples of paint were analysed by gas chromatography.The qualitative and the quantitative analyses were carried out based on the retention time and peak height or peak area respectively.Re -sults The linear range of the method was0.000～0.025%with r=0.9997.The RSD was in the range of0.08～0.75%and the recovery rates ranged95.0～106.7%.Conclusion The method was simple,rapid and accurate,which was suit-able for the determination of free toluene diisocyanate in paint.