...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Field Testing a Flow-Through Sampler for Semivolatile Organic Compounds in Air
【24h】

Field Testing a Flow-Through Sampler for Semivolatile Organic Compounds in Air

机译：流通式采样器现场测试空气中的半挥发性有机化合物

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Even without access to the electrical grid, a flow-through sampler(FTS) can collect gaseous and particle-bound semivolatile organic compounds (SOCs) from large volumes of air by turning into the wind and having the wind blow through a porous sampling medium. To test its performance under field conditions, a FTS and a traditional pumped high volume air sampler, both using polyurethane foam (PUF) as sampling medium, were codeployed at the campus of the University of Toronto Scarborough from August 2006 to June 2007. Quantitative relationships between the wind speed outside the sampler and after passage through the PUF were established and allow the accurate estimation of sampling volumes under conditions of low and high wind speed. Polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) were quantified in the samples taken by both air samplers. Separate analysis of seven PUF disks arranged sequentially within the FTS, confirm that even relatively volatile SOCs do not experience serious break-through. Theoretical plate number analysis of the break-through curves yields an understanding of the effect of temperature and wind speed on FTS sampling efficiency, and reveals different behavior of gaseous and particle-bound-compounds on the PUF. Air concentrations of PCBs and PAHs obtained with the FTS compare favorably with those obtained by averaging the concentrations of several 24 h active high volume samples taken during the same time period.
机译：即使没有接入电网，流通式采样器（FTS）也会通过吹入风并使风吹过多孔采样介质，从大量空气中收集气态和颗粒结合的半挥发性有机化合物（SOC）。为了测试其在野外条件下的性能，从2006年8月至2007年6月，在多伦多大学士嘉堡分校对采用FTS和传统抽气式高容量空气采样器（均使用聚氨酯泡沫（PUF）作为采样介质）进行了代码部署。建立了采样器外部风速和通过PUF后的风速之间的关系，并可以在低风速和高风速条件下准确估算采样量。在两个空气采样器采集的样品中都对多氯联苯（PCB）和多环芳烃（PAH）进行了定量。对在FTS内顺序排列的七个PUF磁盘的单独分析表明，即使是相对易失的SOC也不会有严重的突破。突破曲线的理论塔板数分析可了解温度和风速对FTS采样效率的影响，并揭示气态和颗粒结合化合物在PUF上的不同行为。通过FTS获得的PCBs和PAHs的空气浓度与通过对在同一时间段内采集的24 h活性高容量样品的平均浓度获得的空气浓度相比具有优势。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号