Multiwavelength absorbance of filter deposits for determination of environmental tobacco smoke and black carbon
Multiwavelength absorbance of filter deposits for determination of environmental tobacco smoke and black carbon
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DOI：
10.1016/j.atmosenv.2004.03.038
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发表时间：
2004-07-01
影响因子：
5
通讯作者：
Ensor, DS
中科院分区：
文献类型：
--
作者：
Lawless, PA;Rodes, CE;Ensor, DS
多波长光吸收技术已被开发的聚四氟乙烯过滤器用于个人暴露采样，具有足够的灵敏度，以允许环境烟草烟雾和烟灰（黑）碳的分配。空白过滤器的测量结果表明，过滤器材料本身对总吸光度的贡献相对较小，同一批次的过滤器具有相似的特征;这使得过滤器的回顾性分析非常可行。使用积分球辐射计和多个波长来提供特异性，可以在暴露前未表征的过滤器上以合理的精度确定烟草烟雾和碳。该技术提供了一种低成本、非破坏性的暴露评估;可替代石英过滤器上的标准热重元素碳评估和尿液或唾液样本中的可替宁分析。该方法允许使用相同的样品过滤器来评估质量、碳和烟草烟雾，而不影响存款。(C)2004爱思唯尔有限公司保留所有权利。
A multiwavelength optical absorption technique has been developed for Teflon filters used for personal exposure sampling with sufficient sensitivity to allow apportionments of environmental tobacco smoke and soot (black) carbon to be made. Measurements on blank filters show that the filter material itself contributes relatively little to the total absorbance and filters from the same lot have similar characteristics; this makes retrospective analysis of filters quite feasible. Using an integrating sphere radiometer and multiple wavelengths to provide specificity, the determination of tobacco smoke and carbon with reasonable accuracy is possible on filters not characterized before exposure. This technique provides a low cost, non-destructive exposure assessment;alternative to both standard thermo-gravimetric elemental carbon evaluations on quartz filters and cotinine analyses from urine or saliva samples. The method allows the same sample filter to be used for assessment of mass, carbon, and tobacco smoke without affecting the deposit. (C) 2004 Elsevier Ltd. All rights reserved.