Objective
Two tuna fish reference materials containing methyl mercury were prepared. Homogeneity and stability studies and analytical work were performed for the certification of the contents of total and methyl mercury. The methods used to certify the mass fractions of total mercury (2.85 ug/g in CRM 463 and 5.24 ug/g in CRM 464, on a mass of dry matter basis) and methyl mercury (3.04 ug/g in CRM 463 and 5.50 ug/g in CRM 464, as MeHg cations on a dry mass basis) were established.
Mercury occurs in the environment in various forms e.g. elementary mercury (Hg), inorganic mercury and methyl mercury (MeHg). Elementary mercury is mainly present in the air; inorganic mercury in water; and methyl mercury occurs predominantly in the contaminated food chain (e.g. shell-fish). Methyl mercury compounds are of paramount importance: their toxicity and the risk of humain exposure are high. Because of its toxicity and abundance in the food chain, the limits of exposure to MeHg are at least 5 times less than the exposure to other Hg-compounds. The objective of the project is to develop through collaborative work of a number of experienced laboratories a methodology for accurate determination of MeHg in food. It is envisaged that in a second phase reference materials will be prepared e.g. fish and shell-fish.
STATUS
Third intercomparison concluded in 1991. Certification campaign started in 1992 [mercury and methyl-mercury in tuna fish: candidate CRMs 463 (low content) and 464 (high content)].
Topic(s)
Data not availableCall for proposal
Data not availableFunding Scheme
CSC - Cost-sharing contractsCoordinator
2860 Soeborg
Denmark
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Participants (13)
22589 Hamburg
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LE1 9BH Leicester
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44037 Nantes
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52428 Jülich
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2860 Soeborg
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SE 75126 Uppsala
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30125 Venezia
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30125 Venezia
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S1 1WB Sheffield
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100 31 Stockholm
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15706 Santiago De Compostela
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16147 Genova
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1050 Brussels
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