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On-line analysis of stable isotopes of nitrogen in NH₃, NO and NO₂ at natural abundance levels

Title data

Lauf, Jutta ; Gebauer, Gerhard:
On-line analysis of stable isotopes of nitrogen in NH₃, NO and NO₂ at natural abundance levels.
In: Analytical Chemistry. Vol. 70 (1998) Issue 13 . - pp. 2750-2756.
ISSN 1520-6882
DOI: https://doi.org/10.1021/ac9800053

Abstract in another language

Methods were developed for the on-line analysis of stable isotopes of nitrogen (at natural abundance levels) in NH3, NO and NO2 in order to study the contribution of these trace gases to nitrogen cycling in ecosystems. Standard methods for the combustion of organic substances to N2 (for the determination of the 15N/14N ratios by mass spectrometry) failed to satisfactorily oxidize or reduce the respective trace gases. The following oxidation or reduction techniques ensured quantitative conversion of the trace gases to N2 and analytical precision close to the internal precision of the instrument (precision +/-0.15 o/oo): (1) oxidation of NH3 to N2 at 1150 °C on a NiO surface (which needs a reoxidation before each NH3 analysis; measuring range 11.7-58.8 nmol of NH3, precision +/-0.3 o/oo); (2) reduction of NO to N2 at 1150 °C on a Ni surface (measuring range 33.3-133.3 nmol of NO, precision +/-0.28 o/oo); (3) reduction of NO2 to form NO at 420 °C on a Mo surface followed by further treatment as for NO (measuring range 26.0-129.9 nmol of NO2, precision +/-0.90 o/oo). This last technique was developed due to the poor chromatographic properties of NO2.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER25911
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Ecology
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 11 Sep 2015 06:35
Last Modified: 11 Sep 2015 06:35
URI: https://eref.uni-bayreuth.de/id/eprint/19384