CO2-Laser Extraction-Static Mass Spectrometry Analysis of Ultra-Low Concentrations of Nitrogen in Silicates |
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| Authors: | Franck Humbert Guy Libourel Christian France-Lanord Laurent Zimmermann Bernard Marty |
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| Institution: | Centre de Recherches Pétrographiques et Géochimiques, 15 rue Notre-Dame des Pauvres, B.P. 20, 54501 Vandoeuvre-lès-Nancy Cedex, France;Ecole Nationale Supérieure de Géologie, Avenue du Doyen Roubault, 54501 Vandoeuvre-lès-Nancy Cedex, France |
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| Abstract: | A new installation for the analysis of picomole quantities of nitrogen has been designed and constructed. It permits the simultaneous analysis of N and rare gases extracted from silicates by heating. The extraction procedure involves the use of a CO2 laser as a heater, and the analysis is made by static mass spectrometry using a high sensitivity, high resolution mass spectrometer. Procedural blanks of 2 picomoles N2 (60 picogram N) allow us to analyse routinely N in mg-sized samples such as mantle-derived and meteoritic minerals, and Lunar soil grains. |
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| Keywords: | nitrogen silicates laser extraction mass spectrometry |
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