卷烟主流烟气用剑桥滤片捕集总粒相物,然后用环己烷超声浸取总粒相物中苯并［α］芘。所得浸取液先经HP-5MS毛细管预柱(0.25 mm×1.0 mm,0.25 μm)净化以保护分离柱和离子源,再经HP-5MS毛细管柱(0.25 mm×30 mm,0.25 μm)分离后,质谱测定。苯并［α］芘的质量浓度在4~640 ng·L-1范围内与其峰面积呈线性关系。方法的日内相对标准偏差(n=7)为2.1%,日间相对标准偏差(n=5)为2.4%。按本法分析了5个卷烟样品,所得苯并［α］芘的测定结果与国标法测定结果一致。

The total particulate matters (TPM) in mainstream smoke of cigarettes were trapped by the Cambridge filter and the benzo ［α］ pyrene collected was extracted with cyclohexane. The benzo ［α］ pyrene in the extract obtained was purified by passing through HP-5MS capillary pre-column (0.25 mm×1.0 mm, 0.25 μm) to protect chromatographic column and ion source, and separated on HP-5MS capillary column (0.25 mm×30 mm, 0.25 μm) and determined with MS detection. Linear relationship between values of peak area and mass concentration of benzo ［α］ pyrene was kept in the range of 4-640 ng·L-1. Values of intraday RSD (n=7) and interday (n=5) RSD found were 2.1% and 2.4% respectively. Five samples of cigarette were analyzed by this method, the results of benzo［α］-pyrene found were in consistency with those found by the GB standard method.