期刊
JOURNAL OF CHROMATOGRAPHY A
卷 978, 期 1-2, 页码 129-140出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0021-9673(02)01427-9
关键词
radiocarbon dating; sediments; glycerol dialkyl glycerol tetraethers; sterols; phytols
Repeated semi-preparative normal-phase HPLC was performed to isolate selected biomarkers from sediment extracts for radiocarbon analysis. Flow injection analysis-mass spectrometry was used for rapid analysis of collected fractions to evaluate the separation procedure, taking only 1 min per fraction. In this way 100-1000 mug of glycerol dialkyl glycerol tetraethers, sterol fractions and chlorophyll-derived phytol were isolated from typically 100 g of marine sediment, i.e., in sufficient quantities for radiocarbon analysis, without significant carbon isotopic fractionation or contamination. (C) 2002 Elsevier Science B.V. All rights reserved.
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