离子液体富集-GC/MS法测定卷烟主流烟气中的3种PAHs

Determination of three PAHs in mainstream cigarette smoke by ionic liquid enrichment-GC/MS

为快速准确测定卷烟主流烟气中的苯并[a]蒽、■、苯并[a]芘(Bap),建立了离子液体富集-GC/MS法测定卷烟主流烟气中该3种多环芳烃(PAHs)的方法。优化了提取、富集和反萃取条件,并利用该法检测了28个卷烟样品。结果表明:①最佳条件为甲醇超声提取40 min、离子液体(1-己基-3-甲基咪唑六氟磷酸盐)[C_6MIM][PF_6]用量800μL、水20 mL、离子液体富集时间2 min、环己烷反萃取时间5 min;②PAHs工作曲线的线性相关系数为0.9989-0.999 9,检出限为0.15-0.49μg/L,定量限为0.50-1.64μg/L,加标回收率为81.24%-113.40%,相对标准偏差(RSD)均≤5.0%;③测定结果与行业标准方法无显著性差异。该方法快速准确,显著降低了有机溶剂的消耗量,适合卷烟烟气总粒相物中苯并[a]蒽、■、苯并[a]芘的分析。

In order to rapidly and accurately determine the benzo[a]anthracene, chrysene, benzo[a]pyrene in mainstream cigarette smoke, an ionic liquid enrichment-GC/MS method was developed. The extraction, enrichment and stripping conditions were optimized, and 28 cigarette samples were analyzed by the developed method. The results showed that： 1） The optimal conditions were ultrasonic extracting for 40 min with methanol as the solvent, enriching for 2 min by adding 800 gL of ionic liquid [C6MIM] [PF6] and 20 mL of water, then stripping for 5 min with cyclohexane. 2） The correlation coefficients of calibration curves ranged from 0.998 9 to 0.999 9. The limits of detection and quantification were 0.15-0.49 and 0.50-1.64 μg/L, respectively. The recoveries ranged from 81.24 % to 113.40 % with the relative standard deviation （RSD） no more than 5.0%. 3） There was no significant difference between the experimental results of this method and the results determined by the current industrial standard methods. This method was shown to be fast, accurate and suitable for analyzing the benzo[a]anthracene, chrysene, benzo[a]pyrene in total particulate matter of mainstream cigarette smoke, and the consumption of organic solvents was significantly reduced.