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Atmospheric pressure chemical ionisation liquid chromatography/multistage mass spectrometry for assignment of sedimentary bacteriochlorophyll derivatives

Wilson, Michael A.; Hodgson, Dominic A.; Keely, Brendan J.. 2005 Atmospheric pressure chemical ionisation liquid chromatography/multistage mass spectrometry for assignment of sedimentary bacteriochlorophyll derivatives. Rapid Communications in Mass Spectrometery, 19 (1). 38-46. 10.1002/rcm.1749

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Abstract/Summary

Atmospheric pressure chemical ionisation liquid chromatography/multistage mass spectrometry (APCI-LC/MSn) provides a rapid, on-line method for the assignment of individual bacteriophaeophorbide c and d methyl esters (BPMEs) in complex mixtures. The MS2 spectrum for each component is diagnostic of the type of BPME (c or d), and characteristic losses in MS5 and MS6 permit assignment of the alkyl substituents at positions C-8 and C-12 of the macrocycle. MS5 mass chromatograms permit the deconvolution of coeluting isobaric BPMEs, revealing the true profiles of the individual components. The distributions are different in lake sediments from la Salada de Chiprana (Spain) and Kirisjes Pond (Antarctica), and a novel BPME c with a neo-pentyl substituent has been observed in the Kirisjes Pond sediment.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/rcm.1749
Programmes: BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Signals in Antarctica of Past Global Changes
Additional Keywords: Bacteria, Pigments
NORA Subject Terms: Biology and Microbiology
Chemistry
Date made live: 17 Jan 2008 17:08
URI: http://nora.nerc.ac.uk/id/eprint/2090

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