塑胶运动场地中甲苯二异氰酸酯的气相色谱测定法

Determination of Toluene Diisocyanate in Plastic Playground by Gas Chromatography

目的建立塑胶运动场地中甲苯二异氰酸酯(TDI)的气相色谱测定法。方法样品在80～85℃水浴中经丙酮连续提取12h,经离心、沉淀、过滤后,使用1490型气相色谱仪,经7%SE-30色谱柱分离测定。以保留时间定性,峰面积定量。结果线性范围在最低检出限～0.04380mmol/L之间,回归方程为y=28612x-29.336,r=0.9990,检出限为0.00130mmol/L。该方法的平均回收率为100.8%～103.6%,RSD为5.7%。结论该法适用于聚氨酯塑胶运动场地中TDI含量的测定。

Objective To establish a rapid, accurate and sensitive method for the determination of toluene diisocyanate （TDI） in plastic playground. Methods The samples were distilled continuously for 12 hours by acetone at 80-85 % in water bath,and after centrifuged, precipitated and filtered, separated by using GC 1490,7%SE-30 column, the contents of TDI in the samples were determined by gas chromatography. The qualitative and quantitative analyses were carried out by the retention time and peak area respectively. Results The linear range of the method was 0.001 30-0.043 80 mmol/L. Regression equation was y=28 612x-29.336, with r=0.999, and the limit of detection was 0.001 30 mmol/L. The rates of recovery ranged 100.8%-103.6% ,with RSD of 5.7%. Conclusion The developed method was rapid, accurate,sensitive and is applicable to the determination of TDI in plastic playground.