Fast time response measurements of HNO3 in air with a chemical ionization mass spectrometer
Fast time response measurements of HNO3 in air with a chemical ionization mass spectrometer
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DOI：
10.1029/97jd02214
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发表时间：
1998-02-20
影响因子：
4.4
通讯作者：
Howard, CJ
中科院分区：
文献类型：
--
作者：
Huey, LG;Dunlea, EJ;Howard, CJ
本文介绍了一种用于环境空气中HNO_3快速响应测定的化学电离质谱仪。在科罗拉多博尔德的绿色山梅萨举行的一次非正式的相互比较活动中，该装置得到了鉴定。硝酸是在各种气象条件下测量的。常规获得小于15 pptv的检测限为1 s的积分期。该设备是足够敏感的测量环境水平的HNO3的所有条件下，除了雾或强降水的时期时，HNO3的混合比小于10 pptv。
A chemical ionization mass spectrometer has been developed for fast time response measurements of HNO3 in ambient air. The apparatus was characterized in an informal intercomparison campaign at Green Mountain Mesa in Boulder, Colorado. Nitric acid was measured over a wide range of meteorological conditions. Detection limits of less than 15 pptv for a 1 s integration period were routinely obtained. The apparatus was sufficiently sensitive to measure ambient levels of HNO3 for all conditions except for periods of fog or heavy precipitation when HNO3 mixing ratios were less than 10 pptv.