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首页> 外文期刊>Environmental Science & Technology >Evaluation of Passive Samplers for Assessment of Community Exposure to Toxic Air Contaminants and Related Pollutants
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Evaluation of Passive Samplers for Assessment of Community Exposure to Toxic Air Contaminants and Related Pollutants

机译：被动采样器的评估，以评估社区对有毒空气污染物和相关污染物的接触

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摘要

The precision, accuracy, and sampling rates of Radiello and Ogawa passive samplers were evaluated in the laboratory using a flow-through chamber and under field conditions prior to their use in the 2007 Harbor Community Monitoring Study (HCMS), a saturation monitoring campaign in the communities adjacent to the Ports of Los Angeles and Long Beach. Passive methods included Radiello samplers for volatile organic compounds (benzene, toluene, ethylbenzene, xylenes, 1,3-butadiene), aldehydes (formaldehyde, acetaldehyde, acrolein) and hydrogen sulfide, and Ogawa samplers for nitrogen oxides and sulfur dioxide. Additional experiments were conducted to study the robustness of the passive sampling methods under variable ambient wind speed, sampling duration, and storage time before analysis. Our experimentally determined sampling rates were in agreement with the rates published by Radiello and Ogawa with the following exceptions: we observed a diffusion rate of 22.4 ±0.1 mL/min for benzene and 37.4 ± 1.5 mL/min for ethylbenzene compared to the Radiello published values of 27.8 and 25.7 mL/min, respectively. With few exceptions, the passive monitoring methods measured one-week average ambient concentrations of selected pollutants with sensitivity and precision comparable to conventional monitoring methods averaged over the same period. Radiello Carbograph 4 VOC sampler is not suitable for the collection of 1,3-butadiene due to backdiffusion. Results for the Radiello aldehyde sampler were inconclusive due to lack of reliable reference methods for all carbonyl compounds of interest.
机译：Radiello和Ogawa无源采样器的精度，准确性和采样率是在实验室中使用流通室并在野外条件下进行评估的，然后在2007年港口社区监测研究（HCMS）中使用，这是一项饱和监测活动。洛杉矶港口和长滩附近的社区。被动方法包括用于挥发性有机化合物（苯，甲苯，乙苯，二甲苯，1,3-丁二烯），醛（甲醛，乙醛，丙烯醛）和硫化氢的Radiello采样器，以及用于氮氧化物和二氧化硫的Ogawa采样器。进行了其他实验，以研究被动采样方法在可变环境风速，采样持续时间和分析之前的存储时间下的鲁棒性。实验确定的采样率与Radiello和Ogawa公布的速率一致，但以下情况除外：与Radiello公布的值相比，我们观察到苯的扩散速率为22.4±0.1 mL / min，乙苯的扩散速率为37.4±1.5 mL / min分别为27.8和25.7 mL / min。除少数例外，被动监测方法测量的选定污染物一周平均环境浓度的灵敏度和精确度可与同期传统监测方法的平均值相媲美。由于反向扩散，Radiello Carbograph 4 VOC采样器不适合收集1,3-丁二烯。由于缺乏所有目标羰基化合物的可靠参考方法，Radiello醛采样器的结果尚无定论。

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  • 来源
    《Environmental Science & Technology》 |2011年第6期|p.2243-2249|共7页
  • 作者

    J. Brooks Mason; Eric M. Fujita; David E. Campbell; Barbara Zielinska;

  • 作者单位

    Desert Research Institute Division of Atmospheric Sciences 2215 Raggio Parkway, Reno, Nevada 89512, United States;

    Desert Research Institute Division of Atmospheric Sciences 2215 Raggio Parkway, Reno, Nevada 89512, United States;

    Desert Research Institute Division of Atmospheric Sciences 2215 Raggio Parkway, Reno, Nevada 89512, United States;

    Desert Research Institute Division of Atmospheric Sciences 2215 Raggio Parkway, Reno, Nevada 89512, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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