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Dosage du mercure total et du monométhylmercure dans les organismes et les sédiments marins
Cossa, D.; Coquery, M.; Nakhlé, K.; Caisse, D. (2002). Dosage du mercure total et du monométhylmercure dans les organismes et les sédiments marins. Méthodes d'analyse en milieu marin. Editions IFREMER: Plouzané. ISBN 2-84433-105-X. 27 pp.
Part of: Méthodes d'analyse en milieu marin. Editions IFREMER: Plouzané. ISSN 1637-1844, more

Available in  Authors 
    VLIZ: Geochemistry CHE28 [28689]

Keywords

Authors  Top 
  • Cossa, D.
  • Coquery, M.
  • Nakhlé, K.
  • Caisse, D.

Abstract
    The sampling, pre-treatment and analysis of biota and sediment samples are described here. Total mercury is determined by atomic absorption spectrophotometry after dry ashing of the sample and a preconcentration step of elemental mercury on a gold trap. This rapid, semi-automatic method has been used in the French Mussel Watch Program (RNO) since 1997. For a 20 mg sample, the detection limit is 0.007 ng.mg-1 (dry weight) and reproducibility is 7 %. The monomethylmercury determination technique consists of an isolation step by ethylation and chromatography and a quantification step using atomic fluorescence spectroscopy. For a 20 mg sample, the detection limit and the reproducibility are respectively 0.004 ng.mg-1 (dry weight) and 10 %.

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