Determination of arsenic in fly ash by hydride generation in a slurry

Nerı́n, Cristina; Zufiaurre, Raquel; Cacho, Juan

doi:10.1007/bf01242433

Cited by 10 publications

(2 citation statements)

References 13 publications

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“…Previous studies of their size distribution 11 showed that the size is less than 5.0 /im. For this reason, these particulates can be in the atmosphere for a long time and finally they can be deposited very far away from the emission source.…”

Section: Samplingmentioning

confidence: 98%

Arsenic as long distance tracer of air pollution

Nerı́n

Zufiaurre

Cacho

et al. 1994

Toxicological & Environmental Chemistry

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The fly ash of small size generated in the combustion of coal can be transported over long distances from the stack. This paniculate matter contains trace elements which can be used as tracers of air pollution. Previous work showed that Arsenic is a good tracer of one of the biggest Power Stations in Spain.38 soil samples were collected in one area where the plume from the Power Plant touches the ground. The analysis of As were carried out by hydride-generation/Atomic Absorption Spectrometry. The results show a strong influence of the Power Station in several uninhabited places situated at approximately 80 Km from the stack.

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Section: Samplingmentioning

confidence: 98%

Arsenic as long distance tracer of air pollution

Nerı́n

Zufiaurre

Cacho

et al. 1994

Toxicological & Environmental Chemistry

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“…In the authors opinion, such an analytical technique is based on a very efficient extraction of the analyte into the liquid phase, but results reported suggested that analyte adsorbed onto solids can also take part in the hydride generation reaction. This approach has been successfully used for the determination of arsenic in light sandy soil, 12 sewage sludge, 12 fly ash, [12][13][14] city waste incineration ash 12 and diatomaceous earth. 14 To the best of our knowledge, no work has been reported on the determination of arsenic in plant samples by slurry sampling combined with hydride generation.…”

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confidence: 99%

Slurry Sampling for Hydride Generation Atomic Absorption Spectrometric Determination of Arsenic in Cigarette Tobaccos

Mierzwa

Adeloju²,

Dhindsa³

1997

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The development of a slurry sampling hydride generation atomic absorption spectrometric (HGAAS) method for the determination of arsenic in cigarette tobacco samples is described. The method is relatively simple and has been shown to give values of total arsenic close to those obtained using methods requiring total dissolution and decomposition of all vegetable matter before analysis. Pre-treatment of samples slurried in nitric acid by ultrasonication permitted the extraction of about 90% of the total arsenic from tobacco samples. Further improvement in the recovery efficiency (up to 93-94%) was accomplished by the use of an additional step of short microwave-accelerated treatment. L-Cysteine was used as a pre-reduction agent. The accuracy and precision of the slurry sampling HGAAS method were studied using the certified reference material (CRM) CTA-OTL-1 Oriental Tobacco Leaves. Under the optimum conditions, as little as 2.6 ng of arsenic can be detected. The relative standard deviation of the overall procedure was calculated to be below 7.6% at arsenic concentration levels of 0.5-0.9 mg kg-1 and the analytical results obtained for the CRM agreed with the certified value. The main factors that influenced the reliability of the method were sample homogeneity, particle size and slurry concentration.

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1998

Atomic Absorption Spectrometry

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Determination of arsenic in fly ash by hydride generation in a slurry

Cited by 10 publications

References 13 publications

Arsenic as long distance tracer of air pollution

Arsenic as long distance tracer of air pollution

Slurry Sampling for Hydride Generation Atomic Absorption Spectrometric Determination of Arsenic in Cigarette Tobaccos

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