A new all-season passive sampling system for monitoring NO2 in air

Field Analytical Chemistry and Technology Pub Date : 1999-01-01 DOI:10.1002/(SICI)1520-6521(1999)3:6<338::AID-FACT3>3.0.CO;2-U

H. Tang, T. Lau, B. Brassard, W. Cool

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引用次数: 32

Abstract

A new all-season passive sampling system for monitoring NO2 in air has been developed. This passive sampling system employs the same approach as the all-season sampling system for monitoring SO2 reported in FACT [Vol. 1(5), 1997] before, but a new collection medium (CHEMIX™) for sampling NO2 has been developed and is used. Compared to the existing collection media used for NO2 passive samplers, such as a triethanolamine (TEA)-coated cellulose fiber filter, CHEMIX™ is less affected by temperature and relative humidity, and has a higher sampling rate. This system has been extensively tested in the lab (temperature from −27 to 20 °C, relative humidity from 4 to 80%, and wind speed from 0.5 to 150 cm/s) and validated in the field in all climates. Comparing measurements obtained with the use of the new passive sampling system with equivalent measurements with the use of a continuous NO2 analyzer yielded an accuracy of greater than 85%. The new NO2 passive sampling system can be used to measure ambient NO2 concentrations ranging from 0.1 to 50 ppb based on a 1-month exposure period. © 1999 John Wiley & Sons, Inc. Field Analyt Chem Technol 3: 338–345, 1999

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一种新型的全季节空气NO2被动采样系统

研制了一种新的全季节空气中二氧化氮被动采样系统。该被动采样系统采用了与FACT[1997年第1卷第5期]之前报道的监测二氧化硫的全季节采样系统相同的方法，但已经开发并使用了一种用于采样二氧化氮的新收集介质(chemx™)。与现有用于NO2被动采样器的收集介质(如三乙醇胺(TEA)涂层纤维素纤维过滤器)相比，chemx™受温度和相对湿度的影响较小，并且具有更高的采样率。该系统已在实验室进行了广泛的测试(温度从- 27°C到20°C，相对湿度从4%到80%，风速从0.5到150 cm/s)，并在所有气候条件下进行了现场验证。将使用新被动采样系统获得的测量结果与使用连续NO2分析仪获得的等效测量结果进行比较，准确度大于85%。新的NO2被动采样系统可用于测量环境NO2浓度范围从0.1到50 ppb基于1个月的暴露期。©1999 John Wiley & Sons, Inc化学工程学报，1999,32 (3):338-345

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Field Analytical Chemistry and Technology

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