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
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.