Selective reduction of arsenic species by hydride generation: atomic absorption spectrometry part 1 - reduction media

Hydride generation - atomic absorption spectrometry, using sodium tetrahydroborate(III) as a reductant, was used to form arsines selectively from inorganic arsenic(III) and arsenic(V), and dimethylarsinic acid (DMA). The selected reaction media allowed the rapid determination of arsenic(III) alone (citrate buffer 0.4 mol/L, pH 4.4), arsenic(III) + arsenic(V) (HCl 6 mol/L, after pre-reduction with potassium iodide) and arsenic(III) + DMA (acetic acid 0.12 mol/L). Total arsenic could be measured in HCl 6 mol/L, after arsenic(V) and DMA pre-reduction with a potassium iodide and stannous chloride mixture. Interference effects produced by heavy metal ions were also evaluated.

Bibliographic Details

Main Authors:	Quináia,Sueli Pércio, Rollemberg,Maria do Carmo Ezequiel
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Química 1997
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000400006
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