GC-MS Determination of Benzo ［α］ Pyrene in Smoke of Cigarettes

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.