2002
DOI: 10.1016/s0003-2670(01)01451-9
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Determination of arsenic in gold samples using matrix exchange differential pulse stripping voltammetry

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Cited by 27 publications
(25 citation statements)
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“…Special attention was paid to Cu(II) and Se(IV) ions whose interference due to the capability to form binary intermetallic compounds with arsenic such as Cu 3 As 2 [5,6,9,12] and As 2 Se 3 [31,32] and represent the most problematic point in the potentiometric procedure. Already a nearly equimolecular ratio of As(III)/Se(IV) had negatively affected the response of arsenic.…”
Section: Interferencesmentioning
confidence: 99%
See 1 more Smart Citation
“…Special attention was paid to Cu(II) and Se(IV) ions whose interference due to the capability to form binary intermetallic compounds with arsenic such as Cu 3 As 2 [5,6,9,12] and As 2 Se 3 [31,32] and represent the most problematic point in the potentiometric procedure. Already a nearly equimolecular ratio of As(III)/Se(IV) had negatively affected the response of arsenic.…”
Section: Interferencesmentioning
confidence: 99%
“…For this reason, several reports have appeared on electrochemical stripping procedures for the determination of arsenic, since it combines low maintenance costs with good accuracy and precision and excellent sensitivity that allows the determination of low levels of metals without prior treatment. This way, arsenic determinations have been made using anodic stripping voltammetry (ASV) at gold film electrode [5,6] or gold electrode [7,8], and cathodic stripping voltammetry (CSV) at hanging mercury drop electrode [9 -11].…”
Section: Introductionmentioning
confidence: 99%
“…The elemental arsenic is then stripped off in stop flow mode using the CS as clean medium under the SWASV parameters mentioned above. The exchange of the sample solution by the CS electrolyte solution minimizes the interference produced by the chlorine generated at the auxiliary electrode (Billing et al, 2002).…”
Section: R-sh + As(v) → R-s-s-r + As(iii) + 2h + (1)mentioning
confidence: 99%
“…Na maioria das vezes, a determinação de As(III) por ASV é realizada empregando-se um filme de ouro depositado por eletrólise sobre eletrodos de carbono-vítreo, grafite ou pasta de carbono como eletrodo de trabalho 35,37,55,[71][72][73][74][75][76] . Nos trabalhos publicados mais recentemente por Feeney e Kounaves 2,68 , um ultramicroeletrodo de ouro (Au-UME) foi desenvolvido e aplicado na determinação de traços de As(III).…”
Section: Determinação De Arsênio Por Asvunclassified