...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >New Instrument Brings PAH Analysis to the Field
【24h】

New Instrument Brings PAH Analysis to the Field

机译：新仪器将PAH分析带入现场

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

The need for rugged, portable instruments for field use at hazardous waste sites has led to development of a new generation of compact gas chromatographs, field-portable X-ray fluorescence (FPXRF) units, and even portable mass spectrometers. These instruments bring the laboratory to the field for most environmental analyses, especially at the screening and semiquantitative levels. Tests that once required transporting samples back to a fully equipped laboratory now can be done without delay in the field. Portable gas chromatographs have made on-site analysis of volatile organic compounds easier, and FPXRF has expedited analysis of inorganic compounds. But the analysis of high molecular weight organic compounds, such as polyaromatic hydrocarbons (PAHs), has remained a difficult problem for scientists engaged in site characterization. PAHs occur in oils, creosotes, tars, and other complex mixtures in many hazardous waste sites. Sites contaminated with creosotes from wood preservation operations, for example, are especially widespread in the southeastern United States. Substances such as tars, oils, and creosotes can pyrolize and plug up costly gas chromatography (GC) columns and detectors. Yet GC is currently the most common method for field analysis of higher molecular weight compounds. Until now, analysts could only modify sample preparation procedures, which risks compromising the sample integrity.
机译：对于在危险废物现场现场使用的坚固耐用的便携式仪器的需求，导致了新一代紧凑型气相色谱仪，现场便携式X射线荧光（FPXRF）装置甚至便携式质谱仪的开发。这些仪器将实验室带到现场进行大多数环境分析，尤其是在筛选和半定量分析方面。曾经需要将样品运回设备齐全的实验室的测试现在可以立即进行，而无需在现场进行延迟。便携式气相色谱仪使挥发性有机化合物的现场分析更加容易，FPXRF加快了无机化合物的分析速度。但是，对于从事位点表征的科学家而言，分析高分子量有机化合物（如聚芳烃（PAH））仍然是一个难题。多环芳烃存在于许多危险废物场所的油，杂酚油，焦油和其他复杂混合物中。例如，木材防腐作业中的杂酚油污染的地点在美国东南部尤为普遍。焦油，油和杂酚油等物质会热解并堵塞昂贵的气相色谱（GC）色谱柱和检测器。然而，GC是目前最常见的高分子量化合物现场分析方法。到目前为止，分析人员只能修改样品制备程序，这有可能损害样品完整性。

著录项

  • 来源
    《Environmental Science & Technology》 |1996年第6期|p.252A-254A|共3页
  • 作者

    CLARE L. GERLACH;

  • 作者单位

    Lockheed Environmental Systems & Technologies Company, Las Vegas, Nev;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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