A continuous-flow denuder for the measurement of ambient concentrations and surface-exchange fluxes of ammonia

被引：0
|
作者：
Wyers, G.P. [1 ]
Otjes, R.P. [1 ]
Slanina, J. [1 ]
机构：
[1] Energy Research Foundation ECN, PO Box 1, 1755 ZG Petten, Netherlands
来源：
Atmospheric Environment - Part A General Topics | 1993年 / 27 A卷 / 13期
关键词：
Air pollution - Ammonia - Gas absorption - Meteorological instruments - Sensors;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A new diffusion denuder is described for the continuous measurement of atmospheric ammonia. Ammonia is collected in an absorption solution in a rotating denuder, separated from interfering compounds by diffusion through a semi-permeable membrane and detected by conductometry. The method is free from interferences by other atmospheric gases, with the exception of volatile amines. The detection limit is 6 ng m-3 for a 30-min integration time. This compact instrument is fully automated and suited for routine deployment in field studies. The precision is sufficiently high for micrometeorological studies of air-surface exchange of ammonia.
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页码：2085 / 2090
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