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Use of Interfaced Gas Chromatography‐Mass Spectrometry for Detection of Concurrent Mineralization and Denitrification in Soil
Author(s) -
Focht D. D.,
Valoras N.,
Letey J.
Publication year - 1980
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1980.00472425000900020011x
Subject(s) - denitrification , mineralization (soil science) , chemistry , mass spectrometry , environmental chemistry , gas chromatography , organic matter , nitrogen , chromatography , organic chemistry
A method using an interfaced gas chromatograph‐mass spectrometer (GC‐MS) is described for measuring the amount of N 2 O and N 2 derived during denitrification from tagged 15 NO 3 − and from 14 NO 3 − , the latter of which is produced during mineralization of soil organic matter. More mineralization and less denitrification was noted with the respective order related to air‐filled pore content: 10%, 5%, 0 (saturated). Denitrification measured directly from the cumulative emissions of N 2 O and N 2 was considerably underestimated by comparison to measuring denitrification by loss of 15 NO 3 − .