Section 7
Chapter 6,243

Quantitative determination of particulate organic nitrogen and carbon in marine phytoplankton samples using mass spectrometer signals from isotope ratio analyses in nitrogen 15 and carbon 13 tracer studies

Slawyk, G.; L'helguen S.; Collos, Y.; Freije, H.

Journal of Experimental Marine Biology and Ecology 115(2): 187-195


ISSN/ISBN: 0022-0981
Accession: 006242868

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A gas-sampling device between an oven for Dumas combustion and an isotope mass spectrometer enables the determination of particulate organic N and C concentrations during isotopic 15N and 13C analysis of phytoplankton samples from dual-labelling experiments. A description of the interface is given with details of the operating procedure. The precision of the method was comparable with an element C-N analyser with a C.V. of 2.70% at the level of 5.17 .mu.mol for N and 7.26% at the level of 48.77 .mu.mol for C.