Improvements in the arsine accumulation-helium glow detector procedure for determining traces of arsenic

Feldman, Cyrus

doi:10.1021/ac50042a019

Cited by 71 publications

(20 citation statements)

References 13 publications

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“…Gefrieren [9,[11][12][13][14] sowie Ansäuern (HCl [10,12]; H 2 SO 4 [15] und Ascorbinsäure -1 g/L verhinderte die Oxidation von As(III), während As(V) nicht reduziert wurde - [16 ]) empfohlen. Bei den im folgenden beschriebenen Untersuchungen wurde insbesondere Kühlen der Proben sowie Ansäuern mit Schwefel-und Ascorbinsäure berücksichtigt.…”

Section: Literaturauswertungunclassified

Anwendung eines neuen Feldanalysenverfahrens zur Untersuchung der Stabilität von Arsen und seinen anorganischen Spezies in aquatischen Systemen

Volke¹,

Merkel

1999

Acta hydrochim. hydrobiol.

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Section: Literaturauswertungunclassified

Anwendung eines neuen Feldanalysenverfahrens zur Untersuchung der Stabilität von Arsen und seinen anorganischen Spezies in aquatischen Systemen

Volke¹,

Merkel

1999

Acta hydrochim. hydrobiol.

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“…This technique was combined with liquid N 2 trap to accumulate AsH 3 for achieving the separation and determination of nanogram amounts of inorganic arsenic and methylarsenic compounds [24]. Feldman [25] improved the technique with respect to the convenience and reproducibility by changing several elements of the procedure, and the time required reduced to 6 minutes per sample. Matsumoto et al [26] applied HG-direct current (dc)-GD-OES to the determination of Pb and Se, together with Ge, As, Sb, and Sn.…”

Section: Introductionmentioning

confidence: 99%

Application of atmospheric pressure dielectric barrier discharge plasma for the determination of Se, Sb and Sn with atomic absorption spectrometry

Zhu

Zhang

Xue

et al. 2006

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…Tallman and Shaikh [16] found that inorganic arsenic solutions (at a level of micrograms per litre) in distilled demineralised water, as well as in the presence of redox agents common in natural wastewaters (for example O 2 , H 2 S and Fe 3+ ), were stable for at least 3 weeks when stored in Pyrex glass with minimum precautions and without preservatives. Feldman reported that in unpreserved samples of As(III) at room temperature, 1-10 µg L -1 of As(III) oxidised completely within 4 days, 100 µg L -1 of As(III) oxidised completely within 7 days and 1 mg L -1 oxidised completely within 18 days without any losses owing to adsorption on the glass walls of the containers [17]. In a BCR experience, pure solutions of mixtures of As(III), As(V), MMA and DMA were shown to display degradation of some compounds after long periods of storage.…”

Section: Introductionmentioning

confidence: 99%

Stability study of As(III), As(V), MMA and DMA by anion exchange chromatography and HG-AFS in wastewater samples

Segura

Muñoz²,

Madrid³

et al. 2002

Analytical and Bioanalytical Chemistry

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The stability of arsenic species (arsenate [As(V)], monomethylarsonate [MMA], dimethylarsinate [DMA] and arsenite [As(III)]) in two types of urban wastewater samples (raw and treated) was evaluated. Water samples containing a mixture of the different arsenic species were stored in the absence of light at three different temperatures: +4 degrees C, +20 degrees C and +40 degrees C. At regular time intervals, arsenic species were determined by high performance liquid chromatography (HPLC)-hydride generation (HG)-atomic fluorescence spectrometry (AFS). The experimental conditions for the separation of arsenic species by HPLC and their determination by AFS were directly optimised from wastewater samples. As(III), As(V), MMA and DMA were separated on an anion exchange column using phosphate buffer (pH 6.0) as the mobile phase. Under these conditions the four arsenic species were separated in less than 10 min. The detection limits were 0.6, 0.9, 0.9 and 1.8 micro g L(-1) for As(III), DMA, MMA and As(V), respectively. As(V), MMA and DMA were found stable in the two types of urban wastewater samples over the 4-month period at the three different temperatures tested, while the concentration of As(III) in raw wastewater sample decreased after 2 weeks of storage. A greater stability of As(III) was found in the treated urban wastewater sample. As(III) remained unaltered in this matrix at pH 7.27 over the period studied, while at lower pH (1.6) losses of As(III) were detected after 1 month of storage. The results show that the decrease in As(III) concentration with time was accompanied by an increase in As(V) concentration.

show abstract

Improvements in the arsine accumulation-helium glow detector procedure for determining traces of arsenic

Cited by 71 publications

References 13 publications

Anwendung eines neuen Feldanalysenverfahrens zur Untersuchung der Stabilität von Arsen und seinen anorganischen Spezies in aquatischen Systemen

Anwendung eines neuen Feldanalysenverfahrens zur Untersuchung der Stabilität von Arsen und seinen anorganischen Spezies in aquatischen Systemen

Application of atmospheric pressure dielectric barrier discharge plasma for the determination of Se, Sb and Sn with atomic absorption spectrometry

Stability study of As(III), As(V), MMA and DMA by anion exchange chromatography and HG-AFS in wastewater samples

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