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
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| Keywords |
Biota
Chemical compounds > Organic compounds > Organometallic compounds > Methyl mercury
Chemical elements > Metals > Heavy metals > Mercury
Sediments
ANE, France [Marine Regions]; MED, France [Marine Regions]
Marine/Coastal |
| Authors | | Top |
- Cossa, D.
- Coquery, M.
- Nakhlé, K.
- Caisse, D.
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| 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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