基于紫外线吸收的微型个人臭氧监测仪。
Miniature Personal Ozone Monitor Based on UV Absorbance.
作者信息
Andersen Peter C, Williford Craig J, Birks John W
机构信息
2B Technologies, Inc., 2100 Central Ave., Suite 105, Boulder, Colorado 80301.
出版信息
Anal Chem. 2010 Oct 1;82(19):7924-7928. doi: 10.1021/ac1013578.
Abstract
A new portable instrument has been developed that offers rapid detection of ozone at the ppb level for personal exposure monitoring. The Personal Ozone Monitor is based on the EPA Federal Reference Method of UV absorbance and has the advantage of being small (10 × 7.6 × 3.8 cm), light-weight (0.3 kg), low power (2.9 watts), and battery-operated. The instrument can be worn by an individual during normal daily activities because it is unaffected by humidity, physical orientation, temperature, and vibration. In order to eliminate any significant interference from water vapor, Nafion(®) tubing was installed before the detection cell, and the optical path was lined with quartz. A precision of 1.5 ppbv and limit of detection of 4.5 ppbv (S/N = 3) was demonstrated with the instrument making measurements every 10 seconds.
摘要
一种新型便携式仪器已被开发出来，它能够对个人暴露情况进行监测，可快速检测出十亿分比水平的臭氧。个人臭氧监测仪基于美国环境保护局（EPA）紫外线吸光的联邦参考方法，具有体积小（10×7.6×3.8厘米）、重量轻（0.3千克）、低功耗（2.9瓦）且由电池供电的优点。该仪器在日常正常活动期间可由个人佩戴，因为它不受湿度、物理方向、温度和振动的影响。为了消除来自水蒸气的任何显著干扰，在检测池之前安装了纳滤（Nafion®）管，并且光路用石英衬里。该仪器每10秒进行一次测量，其精度为1.5 ppbv，检测限为4.5 ppbv（信噪比=3）。
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