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Certified reference materials for arsenic in marine animal tissues
Both arsenite and arsenate accumulate in biological tissues because of their affinity for proteins, lipids and other cellular compounds. The ability of aquatic organisms to transform inorganic arsenic species into complex organoarsenicals appears to be retained along the food chain. More than 25 arsenic species have been reported in biological tissues. The interest in arsenic speciation results from the great differences in the toxicity of the different arsenic species. In general, organo-arsenic compounds are significantly less toxic than inorganic arsenic compounds.
The main issues to be controlled during the analysis of biological tissues for the speciation analysis of arsenic are:
- quantitativeness of extraction of the species of interest from the tissue
- preservation of the different species during the analysis
- mass balance with respect to arsenic species determined
CRMs play a major role in the development and validation of
methods and for quality control. The following certified reference
materials (CRMs) are available for speciation analysis:
Supplier
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Name
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Material
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Certificate
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| BCR |
CRM 627
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Tuna fish tissue
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Total arsenic, Dimethylarsinic acid, Arsenobetaine
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| BCR |
CRM 710
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Oyster tissue
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Arsenobetaine
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NIES
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NIES-15
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Clams
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Arsenobetaine
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NRCC
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DORM-2
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Dogfish muscle
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Al, As, Cd, Co, Cr, Cu, Fe, Pb, Mn, Hg, Ni, Se, Ag, Tl, Sn, Zn, Methylmercury, Arsenobetaine, tetramethylarsonium
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* () =information value only, []= original certification no longer valid
NB:! click on the suppliers name to reach his website, click on the
material name for a link to the report, click on the certified species
for a link to the certificate  consult EVISA's Material Database for materials related to arsenic speciation
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