Determination of Arsenic in Algae – Results of an Interlaboratory Trial: Determination of Arsenic Species in the Water-Soluble Fraction

Autor:	Jörg Feldmann, Peter Fecher, Andrea Raab
Rok vydání:	2005
Předmět:	biology Chemistry media_common.quotation_subject Extraction (chemistry) chemistry.chemical_element biology.organism_classification Analytical Chemistry Speciation Algae Environmental chemistry Sample preparation Round robin test Sea lettuce Quantitative analysis (chemistry) Arsenic media_common
Zdroj:	Microchimica Acta. 151:153-166
ISSN:	1436-5073 0026-3672
DOI:	10.1007/s00604-005-0395-7
Popis:	Seven algae samples, five purchased from food stores and two reference algae (BCR 279 Sea Lettuce) were distributed as blind samples to 13 labo- ratories from which five labs attempted a full charac- terisation of the water-soluble fraction with respect to their arsenic species. The extraction efficiency is largely dependant on the algae and varied from 3% to 96%. Besides inorganic arsenic (mainly as As (V) )D MA (V) and, in particular, several arsenosugars were identified in all samples. From the five labs, three labs gave agree- able results in respect of the arsenic species identification and its quantification, although different chromato- graphic methods were used. Different Hijiki samples seem to contain largely different arsenic concentration (67-113 mg As=kg) which may also have an influence on the distribution of inorganic arsenic and arsenosugars.
Databáze:	OpenAIRE
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