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This article in JEQ

  1. Vol. 9 No. 2, p. 218-223
     
    Received: Aug 15, 1978


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doi:10.2134/jeq1980.00472425000900020011x

Use of Interfaced Gas Chromatography-Mass Spectrometry for Detection of Concurrent Mineralization and Denitrification in Soil1

  1. D. D. Focht,
  2. N. Valoras and
  3. J. Letey2

Abstract

Abstract

A method using an interfaced gas chromatograph-mass spectrometer (GC-MS) is described for measuring the amount of N2O and N2 derived during denitrification from tagged 15NO3 and from 14NO3, 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 N2O and N2 was considerably underestimated by comparison to measuring denitrification by loss of 15NO3.

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