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Sampling systems for isotope‐ratio mass spectrometry of atmospheric ammonia
Author(s) -
Skinner Richard,
Ineson Phil,
Jones Helen,
Sleep Daren,
Theobald Mark
Publication year - 2005
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.2279
Subject(s) - chemistry , sampling (signal processing) , ammonia , mass spectrometry , isotope , analytical chemistry (journal) , isotope ratio mass spectrometry , fractionation , environmental chemistry , chromatography , organic chemistry , physics , quantum mechanics , computer science , filter (signal processing) , computer vision
Passive and active ammonia (NH 3 ) sampling devices have been tested for their nitrogen (N) capture potential and δ 15 N fractionation effects. Several sampling techniques produced significantly different δ 15 NH 3 signals when sampling the same NH 3 source released from field site fumigation campaigns. Conventional passive NH 3 ‐monitoring systems have shown to provide insufficient N for isotope‐ratio mass spectrometry and various modified devices have been developed, based on existing diffusion tube designs, to overcome this problem. The final sampler design was then tested in a wind tunnel to verify that sampling NH 3 in different environmental conditions did not significantly fractionate the δ 15 N signal. Copyright © 2005 John Wiley & Sons, Ltd.