%0 Journal Article
%T Selective reduction of arsenic species by hydride generation - atomic absorption spectrometry. Part 2 - sample storage and arsenic determination in natural waters
%A Quin¨¢ia Sueli P.
%A Rollemberg Maria do Carmo E.
%J Journal of the Brazilian Chemical Society
%D 2001
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%X Total arsenic, arsenite, arsinate and dimethylarsinic acid (DMA) were selectively determined in natural waters by hydride generation - atomic absorption spectrometry, using sodium tetrahydroborate(III) as reductant but in different reduction media. River water samples from the north region of Paran¨¢ State, Brazil, were analysed and showed arsenate as the principal arsenical form. Detection limits found for As(III) (citrate buffer), As(III) + DMA (acetic acid) and As(III) + As(V) (hydrochloric acid) were 0.6, 1.1 and 0.5 mg As L-1, respectively. Sample storage on the proper reaction media revealed to be a useful way to preserve the water sample.
%K natural waters
%K arsenic speciation
%K atomic absorption spectrometry
%K sample storage
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532001000100004