Behaviour of various arsenic species in electrothermal atomic absorption spectrometry

Rastegar, F.; Leroy, M. J. F.

doi:10.1039/ja9961100997

Cited by 33 publications

(9 citation statements)

References 16 publications

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“…Many arsenic compounds are highly volatile and losses of arsenic may occur during the ashing phase [5]. Spectral interference are observed especially when continuum source background correction is used.…”

Section: Introductionmentioning

confidence: 99%

Development of a microwave sample preparation method for the determination of arsenic in humus and moss samples by graphite furnace atomic absorption spectrometry

Perämäki

Pesonen

Piispanen³

2000

Analusis

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Abstract. Two sample decomposition methods were optimized for the determination of arsenic by graphite furnace atomic absorption spectrometry (GFAAS) in moss and humus samples. In the first method, 5,0 ml of HNO 3 and 3,0 ml of H 2 O 2 were used for the decomposition of 500 mg of sample. When humus samples were decomposed in this way a slight, undissolved residue remained. Therefore, another sample decomposition method, including hydrofluoric acid, was also tested (5,0 ml HNO 3 ; 3,0 ml H 2 O 2 ; 0,4 ml HF; 2,5 ml H 3 BO 3 ). Pyrolytically coated graphite tubes, equipped with integrated or L´vov platfoms, were used in the determination of arsenic by GFAAS. Palladium-magnesium nitrate was used as a matrix modifier. Several reference materials (e.g. humus, moss, lichen, sea lettuce) were analyzed.

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Section: Introductionmentioning

confidence: 99%

Development of a microwave sample preparation method for the determination of arsenic in humus and moss samples by graphite furnace atomic absorption spectrometry

Perämäki

Pesonen

Piispanen³

2000

Analusis

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“…Various workers have used palladium modi®er either as the chloride or the nitrate. 14,15 In general, however, the mechanism of its action is not discussed and remains unknown. The effect of chloride was usually investigated by using sodium chloride and in most cases it was found to be negligible.…”

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confidence: 99%

Modifier effects in the determination of arsenic, antimony and bismuth by electrothermal atomic absorption spectrometry

Pszonicki¹,

Dudek²

1999

J. Anal. At. Spectrom.

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The effect of palladium, mixed palladium±magnesium and magnesium modi®ers on the determination of arsenic, antimony and bismuth was tested. It was found that palladium modi®er works correctly only in nitric acid solution. If the sample solution contains hydrochloric acid then palladium becomes a strong interferent and causes signi®cant losses of the analyte. For arsenic and antimony, but not for bismuth, this shortcoming may be eliminated by use of mixed palladium±magnesium or magnesium modi®er. Magnesium modi®er was found to be superior to the mixed modi®er since it is able to eliminate also the negative effects of perchloric acid and of the iron group elements. It is, however, completely ineffective in relation to bismuth when used individually or in a mixture with palladium. Palladium may be used as a modi®er for the determination of antimony and bismuth in hydrochloric acid solution only when it is preliminarily reduced to the metal form. The mechanism of the modi®er activity is discussed.

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“…The addition of Ni was reported to eliminate this effect [181]. Slaveykova et al [182] investigated the atomization behaviour of arsenic species in pyro-coated and tungsten-coated graphite tubes with Pd modifiers and reported that it improved the sensitivity of various As species. Barrera et al [177] investigated the hydride-trapping efficiency with Ir-, W-, and Zr-coated graphite tubes, and reported that Zr-coated tubes gave a better performance.…”

Section: Hg-gfaas Techniquesmentioning

confidence: 98%

Non-chromatographic hydride generation atomic spectrometric techniques for the speciation analysis of arsenic, antimony, selenium, and tellurium in water samples—a review

Kumar

Riyazuddin

2007

International Journal of Environmental Analytical Chemistry

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Behaviour of various arsenic species in electrothermal atomic absorption spectrometry

Cited by 33 publications

References 16 publications

Development of a microwave sample preparation method for the determination of arsenic in humus and moss samples by graphite furnace atomic absorption spectrometry

Development of a microwave sample preparation method for the determination of arsenic in humus and moss samples by graphite furnace atomic absorption spectrometry

Modifier effects in the determination of arsenic, antimony and bismuth by electrothermal atomic absorption spectrometry

Non-chromatographic hydride generation atomic spectrometric techniques for the speciation analysis of arsenic, antimony, selenium, and tellurium in water samples—a review

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