ISSN:
0268-2605
Schlagwort(e):
arsenic species
;
marine plankton
;
arsenobetaine
;
arsenic-containing ribofuranosides
;
arsenosugars
;
HPLC-ICP/MS
;
Chemistry
;
Industrial Chemistry and Chemical Engineering
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Major water-soluble arsenic compounds accumulated in some zoo- and phyto-plankton were identified. Zooplankton were collected at sampling stations in the Sea of Japan by a Norpac net towed from 600 m depth to the surface. Phytoplankton were cultivated under axenic conditions. Water-soluble arsenic compounds were extracted repeatedly from plankton tissues by aqueous methanol. The arsenic compounds in the extracts were analyzed by HPLC-ICP/MS.Among zooplankton analyzed in the present study, two carnivorous species, i.e. Amphipoda (Themistosp.) and Sagittoidea (Sagittasp.), contained arsenobetaine as the dominant arsenic species. Arsenobetaine was the major species in Euphausiacea (Euphausiasp.), also. The most abundant arsenic compound in the herbivorous Copepoda species (Calanussp.), on the other hand, was an arsenic-containing ribofuranoside with a sulfate ester group, and arsenobetaine was only a minor component. Phytoplankton contained arsenic-containing ribofuranosides apparently in a species-speific manner. The arsenic compounds in zooplankton seem to reflect their feeding habit; i.e. carnivorous species eating zooplankton or other small animals accumulate arsenobetaine, while herbivorous ones eating phytoplankton accumulate arsenic-containing ribofuranosides as major arsenic compounds.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
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