High-Throughput Determination of Mercury in Tobacco and Mainstream Smoke from Little Cigars
High-Throughput Determination of Mercury in Tobacco and Mainstream Smoke from Little Cigars
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DOI：
10.1093/jat/bkv069
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发表时间：
2015-09-01
影响因子：
2.5
通讯作者：
Pappas, R. Steven
中科院分区：
文献类型：
--
作者：
Fresquez, Mark R.;Gonzalez-Jimenez, Nathalie;Pappas, R. Steven
开发了一种利用铂捕集器从主流烟草烟雾中捕集汞的方法，这代表了对需要撞击器和长时间样品制备程序的传统方法的改进。在这种方法中，通过在直接汞分析仪中加热捕集器，直接释放捕获的汞进行分析。将该方法应用于小雪茄主流烟气中汞的分析。在加拿大卫生部强烈吸烟机条件下获得的小雪茄烟雾中的汞含量范围为 7.1 x 10(-3) 至 1.2 x 10(-2) mg/m(3)。这些空气汞含量超过了有毒物质和疾病登记局确定的针对间歇性接触金属汞（例如，每天 1 或 2 小时，每周 5 天）校正的慢性吸入最低风险水平。使用多变量统计分析来评估汞含量与小雪茄物理设计特性之间的关联。过滤器通风被确定为影响 ISO 机器吸烟条件下产生的主流小雪茄烟雾中汞浓度的主要物理参数。在加拿大卫生部强烈吸烟条件下，由于过滤器通风受阻，烟草中的汞浓度和抽吸量（烟量）是影响主流烟气汞浓度的主要物理参数。
A method was developed that utilizes a platinum trap for mercury from mainstream tobacco smoke, which represents an improvement over traditional approaches that require impingers and long sample preparation procedures. In this approach, the trapped mercury is directly released for analysis by heating the trap in a direct mercury analyzer. The method was applied to the analysis of mercury in the mainstream smoke of little cigars. The mercury levels in little cigar smoke obtained under Health Canada Intense smoking machine conditions ranged from 7.1 x 10(-3) to 1.2 x 10(-2) mg/m(3). These air mercury levels exceed the chronic inhalation minimal risk level corrected for intermittent exposure to metallic mercury (e.g., 1 or 2 h per day, 5 days per week) determined by the Agency for Toxic Substances and Disease Registry. Multivariate statistical analysis was used to assess associations between mercury levels and little cigar physical design properties. Filter ventilation was identified as the principal physical parameter influencing mercury concentrations in mainstream little cigar smoke generated under ISO machine smoking conditions. With filter ventilation blocked under Health Canada Intense smoking conditions, mercury concentrations in tobacco and puff number (smoke volume) were the primary physical parameters that influenced mainstream smoke mercury concentrations.