Background effects on Faraday collectors in gas-source mass spectrometry and implications for clumped isotope measurements: Background effects on Faraday collectors in mass spectrometry

Bernasconi, Stefano M. and Hu, Bin and Wacker, Ulrike and Fiebig, Jens and Breitenbach, Sebastian F. M. and Rutz, Tanja (2013) Background effects on Faraday collectors in gas-source mass spectrometry and implications for clumped isotope measurements: Background effects on Faraday collectors in mass spectrometry. Rapid Communications in Mass Spectrometry, 27 (5). pp. 603-612. ISSN 1097-0231 DOI 10.1002/rcm.6490

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Abstract

The measurement of the abundances of minor isotopologues by mass spectrometry requires correction of subtle non-linearities in the mass spectrometer that cause deviations in the relationship between actual and measured isotope ratios. Here we show that negative backgrounds on the Faraday cups recording the minor ion beams are the cause of the observed non-linearities in the measurement of CO2 isotopologues, and propose a new correction procedure for clumped isotope measurements.

Item Type:	Article
Uncontrolled Keywords:	NILAREP
Subjects:	01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions:	01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title:	Rapid Communications in Mass Spectrometry
Volume:	27
Page Range:	pp. 603-612
Identification Number:	10.1002/rcm.6490
Depositing User:	Sarah Humbert
Date Deposited:	20 Aug 2015 14:39
Last Modified:	20 Aug 2015 14:39
URI:	http://eprints.esc.cam.ac.uk/id/eprint/3469

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