...
首页> 外文期刊>Applied physics >Photoacoustic spectrometer for accurate, continuous measurements of atmospheric carbon dioxide concentration
【24h】

Photoacoustic spectrometer for accurate, continuous measurements of atmospheric carbon dioxide concentration

机译:光声光谱仪可准确,连续地测量大气中的二氧化碳浓度

获取原文
获取原文并翻译 | 示例
           

摘要

We have developed a portable photoacoustic spectrometer that offers routine, precise and accurate measurements of the molar concentration of atmospheric carbon. The temperature-controlled spectrometer continuously samples dried atmospheric air and employs an intensity-modulated distributed feedback laser and fiber amplifier operating near 1.57 μm. For measurements of carbon dioxide in air, we demonstrate a measurement precision (60-s averaging time) of 0.15 μmol mol~(-1) and achieve a standard uncertainty of 0.8 μmol mol~(-1) by calibrating the analyzer response in terms of certified gas mixtures. We also investigate how water vapor affects the photoacoustic signal by promoting collisional relaxation of the carbon dioxide.
机译:我们开发了一种便携式光声光谱仪,可对大气中碳的摩尔浓度进行常规,精确和准确的测量。温控光谱仪连续采样干燥的大气,并采用强度调制的分布式反馈激光和光纤放大器,工作频率接近1.57μm。对于空气中二氧化碳的测量,我们证明了测量精度(60 s平均时间)为0.15μmolmol〜(-1),并通过校准分析仪的响应达到了0.8μmolmol〜(-1)的标准不确定度。经认证的气体混合物。我们还研究了水蒸气如何通过促进二氧化碳的碰撞松弛来影响光声信号。

著录项

  • 来源
    《Applied physics》 |2014年第2期|645-657|共13页
  • 作者单位

    National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA;

    National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA;

    National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA;

    National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA;

    National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA;

    National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 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