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Using a CHN analyzer to reduce carbonate interference in particulate organic carbon analyses

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Abstract

Using a CHN analyzer at a reduced temperature (720°C), the organic carbon of particulates taken from water is oxidized while little, if any, dissociation of carbonate occurs. When necessary for increased precision or for samples with a high CaCO3 content, the small interference of carbonate with organic C determinations can be quantified by running representative samples at different oxidation time intervals and interpolating to time zero. By running replicates, one at 720°C and one at 1100°C, data on organic and inorganic carbon and on nitrogen are obtained with the analyzer.

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Author notes

  1. G. Telek

    Present address: Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island, USA

Authors and Affiliations

  1. Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island, USA

    N. Marshall

Authors
  1. G. Telek
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  2. N. Marshall
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Communicated by J. Bunt, Miami

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Telek, G., Marshall, N. Using a CHN analyzer to reduce carbonate interference in particulate organic carbon analyses. Mar. Biol. 24, 219–221 (1974). https://doi.org/10.1007/BF00391896

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  • DOI: https://doi.org/10.1007/BF00391896

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