Abstract
The various chemical forms of 74As accumulated from either water or food by the marine food chain [Fucus spiralis (L.)→ Littorina littoralis (L.)→Nucella lapillus] have been separated and characterized. Arsenic components were separated by differential extraction followed by high-voltage paper electrophoresis/paper chromatography of the water-soluble fraction and thin-layer chromatography of the lipid-soluble fraction. The algae assimilates arsenic mainly (60%) as one lipid-soluble compound with Rf=0.18, and 12 water-soluble organo-arsenic compounds as minor components. On the other hand, the snails, whether labelled from water or food, produce predominantly one major water-soluble organo-arsenic compound with Rf=0.66. This water-soluble arsenic compound was produced by the snails and not by intestinal microbes. Time-course studies on the relative proportions of labelled arsenic compounds in algal tissue indicate a transition from arsenate through water-soluble organo-arsenic components to a lipid-soluble arsenic compound. The water-soluble organo-arsenic compounds in the food chain studied were different from those previously found or proposed in marine organisms.
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Communicated by G. F. Humphrey, Sydney
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Klumpp, D.W., Peterson, P.J. Chemical characteristics of arsenic in a marine food chain. Mar. Biol. 62, 297–305 (1981). https://doi.org/10.1007/BF00397696
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DOI: https://doi.org/10.1007/BF00397696