Aqueous extraction of airborne particulate matter collected on Hi-Vol Teflon filters
Aqueous extraction of airborne particulate matter collected on Hi-Vol Teflon filters
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DOI：
10.1080/03067319608028327
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发表时间：
1996-01-01
影响因子：
2.6
通讯作者：
Keeler, GJ
中科院分区：
文献类型：
--
作者：
Biran, R;Tang, YZ;Keeler, GJ
开发了一种提取方法，用于定量回收收集在高通量聚四氟乙烯过滤器上的细颗粒物，并以适合于评估大气气溶胶的生物反应性的形式。确定的选择程序的两个主要标准是最大回收率和最小化引入浸提液的化学品。用不同体积的预润湿剂（乙醇）和超声处理时间进行实验，以选择适当的条件从疏水性Teflon表面水提取材料。开发的程序涉及用2 mL乙醇预润湿过滤器（切成8片），并在400 mL超纯水中超声处理30分钟。重量分析结果表明，Teflon过滤器的物料质量回收率较高（91+/-7%）。多环芳烃（PAH）的分析进行了有机提取物的部分聚四氟乙烯过滤器的颗粒和部分相同的过滤器进行水提取。结果的比较显示，高百分比（92+/-11%）的多环芳烃转移到水溶液中使用开发的提取方法。对Teflon过滤器（装载颗粒）和Teflon过滤器水提取物的冻干残留物进行的无机物分析也表明无机物向水提取物中的转移率较高（84+/-33%）。
An extraction method was developed for the quantitative recovery of fine particles collected on Hi-Vol Teflon filters and in a form suitable for assessment of the biological reactivity of atmospheric aerosols. Two major criteria identified for the selection of a procedure were maximum recovery and minimization of the introduction of chemicals into the extract solution. Experiments were conducted with different volumes of a pre-wetting agent (ethanol) and sonication times to select the appropriate conditions for the aqueous extraction of material from the hydrophobic Teflon surface. The developed procedure involved the pre-wetting of a filter (cut into 8 pieces) with 2 mL ethanol and sonication in 400 mL ultra pure water for 30 minutes. Results of gravimetric analyses indicated high mass recoveries (91+/-7%) of material from the Teflon filters. Analyses for polycyclic aromatic hydrocarbons (PAHs) were performed on organic extracts of portions of Teflon filters with particles and portions of the same filters subjected to aqueous extraction. Comparison of the results revealed high percentages (92+/-11%) of PAHs were transferred into the aqueous solution using the extraction method developed. Inorganic analyses performed on Teflon filters (loaded with particles) and freeze-dry residues of aqueous extracts of Teflon filters also suggested high transfer rates (84+/-33%) of inorganics into the aqueous extracts.