Le Dosage Du Carbone Particulaire Dans L'Eau De Mer Et Son Application Dans Le Golfe Du Lion

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Abstract
Particulate carbon is determined by filtering seawater (0.5–2.1) through a glass filter which is dried and combusted at 700°C. After removing unwanted gases by absorbents, CO2 is swept by oxygen into a vessel containing 0.01 N NaOH. The conductivity change in this solution is recorded continuously. The apparatus is calibrated against known amounts of ammonium oxalate. Particulate carbon determinations have been made over the range of 10–900 μg C/l and against a standard, 10 replicates gave a mean of 351 μg C/l ±14.2, coefficient of variation ±4%. The apparatus can be used at sea and each analysis takes 5–6 minutes. The method has been used on survey in the Gulf of Lion and the results for this area are discussed in relation to hydrographic conditions.

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