SEPARATION AND SPECIATION OF INORGANIC AND METHYLARSENIC COMPOUNDS IN MARINE SAMPLES

OCHSENKUHNPETROPULU, M; OCHSENKUHN, KM; MILONAS, I; PARISSAKIS, G

dc.contributor.author	OCHSENKUHNPETROPULU, M	en
dc.contributor.author	OCHSENKUHN, KM	en
dc.contributor.author	MILONAS, I	en
dc.contributor.author	PARISSAKIS, G	en
dc.date.accessioned	2014-03-01T01:44:07Z
dc.date.available	2014-03-01T01:44:07Z
dc.date.issued	1995	en
dc.identifier.issn	0045-5105	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24279
dc.subject.classification	Spectroscopy	en
dc.subject.other	LIQUID-CHROMATOGRAPHY	en
dc.subject.other	ARSENIC SPECIATION	en
dc.subject.other	SPECTROMETRY	en
dc.subject.other	WATER	en
dc.title	SEPARATION AND SPECIATION OF INORGANIC AND METHYLARSENIC COMPOUNDS IN MARINE SAMPLES	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	A combination of an extraction and two-step ion-exchange process has been developed for the separation and speciation of As(III), As(V) and their methylated forms mono-(MMA) and dimethylarsenic acid (DMA) at trace levels in marine samples. As(III) was first separated from all investigated As-compounds by extraction with ammonium pyrrolidinedithiocarbamate (APDC) into isobutylmethylketone (IBMK) at pH = 2 and determined after backstripping with HCl (1:1) by hydride-generation AAS. The remaining As species were passed through the cation exchange resin Dowex 50W-X8, where DMA was quantitatively retained As(V) and MMA, present in the effluent, were subsequently fixed in the anion exchanger AG1-X8. Experimental conditions, including pH of the sample solutions and competing ions were studied in order to achieve quantitative retention of these As compounds. By sequential elution, a good separation of the individual As species was obtained. The As concentration in each fraction as well as total arsenic were determined by the hydride generation AAS technique. The developed process has been applied to the analysis of simulated synthetic As mixtures obtained from BCR and of real marine samples.	en
heal.publisher	POLYSCIENCE PUBL INC	en
heal.journalName	CANADIAN JOURNAL OF APPLIED SPECTROSCOPY	en
dc.identifier.isi	ISI:A1995RK36000001	en
dc.identifier.volume	40	en
dc.identifier.issue	3	en
dc.identifier.spage	61	en
dc.identifier.epage	65	en