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Methods to Reduce Interference Effects in Thermal Conversion Elemental Analyzer/continuous Flow Isotope Ratio Mass Spectrometry Delta18O Measurements of Nitrogen-containing Compounds

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On-line determination of the oxygen isotopic composition (delta 18O value) in organic and inorganic samples is commonly performed using a thermal conversion elemental analyzer linked to a continuous flow isitope ratio mass spectrometer (TC-EA-IRMS). Accurate delta 18O analysis of N-containing compounds (like nitrates) by TC-EA-IRMS may be complicated because of interference of the N2-peak on the m/z 30 signal of the CO peak, which s used for calculation of the delta 18O value. The aim of this study was to evaluate the effectiveness of different strategies to eliminate this interference.
2008-07-25
JOHN WILEY & SONS LTD
JRC42018
0951-4198,   
https://publications.jrc.ec.europa.eu/repository/handle/JRC42018,   
10.1002/rcm.3609,   
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