热脱附-气相色谱-质谱法测定聚氨酯发泡床垫中12种挥发性有机化合物

GC-MS Determination of 12 Volatile Organic Compounds in Foamed Mattresses of Polyurethane with Thermal Desorption

采用热脱附-气相色谱-质谱法测定聚氨酯发泡床垫中12种挥发性有机化合物的含量。采用挥发性有机化合物的环境气候箱模拟室内环境,用含有Tenax TA的吸附管收集释放出的挥发性有机化合物。在气相色谱分离中采用DB-5MS毛细管色谱柱,在质谱分析中采用全扫描模式。12种挥发性有机化合物的质量在一定范围内与其对应的峰面积呈线性关系,方法的检出限(3S/N)为1.0μg·m^(-3)。加标回收率为84.3%～106%,测定值的相对标准偏差(n=6)为8.0%～9.8%。

GC-MS was applied to the determination of 12 volatile organic compounds in foamed mattresses of polyurethane with thermal desorption. Indoor environment was simulated with environmental climate box of volatile organic compounds, and volatile organic compounds released were collected by adsorption tubes containing Tenax TA. The DB 5MS capillary chromatographic column was used for GC separation and the full scanning mode was adopted in MS determination. Linear relationships between values of peak area and mass of the 12 volatile organic compounds were kept in definite ranges, with detection limit （3S/N） of 1.0 μg · m^-3 . Values of recovery found by standard addition method were in the range of 84.3%-106%, and values of RSDs （n=6） in the range of 8.0%- 9.8%.