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Laser-induced photoacoustic detection of ozone at 266 nm using resonant cells of different configuration

机译：使用不同配置的共振池，激光诱导的266 nm臭氧光声检测

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摘要

A highly sensitive pulsed photoacoustic (PA) spectrometer with different PA cell geometries was designed and fabricated in our laboratory to determine ozone detection at ppb level. The comparative performance and merits of these custom made cells were studied. The excitation source of PA spectrometer is a nanosecond pulsed laser at 266 nm (fourth harmonic of Nd:YAG laser) and a sensitive electret microphone as a photoacoustic detector. The sensitivity optimization of the PA system with different experimental parameters including the resonant acoustic modes of the 3 PA cells was carried out for the detection of ozone. The minimum detection limit for ozone achieved under our experimental conditions, with 3 PA cells were 10, 31 and 26 ppbV for cells designated as cell # 1, cell # 2 and cell # 3, respectively. This limit of ozone detection achieved in our work is quite appreciable to be able to detect ozone under safe permissible limits and the sensitivity achieved in our case is an order of magnitude better than earlier reports using sophisticated laser system like quantum cascade laser.
机译：在我们的实验室中设计并制造了具有不同PA单元几何形状的高灵敏脉冲光声（PA）光谱仪，以确定ppb级的臭氧检测量。研究了这些定制电池的比较性能和优点。 PA光谱仪的激发源是266 nm的纳秒脉冲激光（Nd：YAG激光的四次谐波）和灵敏的驻极体传声器作为光声检测器。对包括3个PA电池的共振声模在内的不同实验参数的PA系统进行了灵敏度优化，以检测臭氧。在我们的实验条件下，用3个PA电池分别指定为1号，2号和3号电池的最小检出限为10、31和26 ppbV。在我们的工作中实现的臭氧检测极限非常可观，能够在安全允许的极限范围内检测臭氧，并且在我们的案例中实现的灵敏度比使用复杂的激光系统（例如量子级联激光器）的早期报告要高一个数量级。

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  • 来源
    《Journal of Environmental Science and Health》 |2009年第13ptaa期|1457-1464|共8页
  • 作者

    M. A. GONDAL; A. DASTAGEER; Z. H. YAMANI;

  • 作者单位

    Laser Research Group, Physics Department and Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi-Arabia;

    Laser Research Group, Physics Department and Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, Saudi-Arabia;

    Laser Research Group, Physics Department and Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, Saudi-Arabia;

  • 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
  • 关键词

    ozone detection; ozone sensor; laser photoacoustic spectroscopy; trace gas analysis; pollution monitoring;

    机译：臭氧检测;臭氧传感器激光光声光谱法;微量气体分析污染监测;

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