Ion-exchange separation and determination of selenium in ambient particulates by heated quartz cell-atomic absorption spectrophotometry

Yamashige, Takashi; Ohmoto, Yukisato; Shigetomi, Yasumasa

doi:10.2116/bunsekikagaku.27.10_607

Cited by 3 publications

(2 citation statements)

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“…Consequently, improved atomic absorption sensitivity may be expected at 185.0 nm compared to 253.7 nm, since the absorption coefficient is proportional to the oscillator strength of each line (7). Despite the advantage in the use of the 185.0-nm line, based on the consideration of oscillator strength, only a few investigations have been reported in terms of VUV atomic absorption spectrometry of mercury (8)(9)(10)(11). This may be due to the experimental difficulty in the VUV region be-…”

Section: Vacuum-ultraviolet Atomic Absorption Spectrometry Of Mercury...mentioning

confidence: 99%

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Sub-part-per-billion determination of total dissolved selenium and selenite in environmental waters by x-ray fluorescence spectrometry

Robberecht¹,

Grieken²

1980

Anal. Chem.

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The tetravalent and hexavalent selenium content of different environmental water types can be determined after preconcentration on activated carbon by simple energy-dispersive X-ray fluorescence. The elemental selenium Is adsorbed on the activated carbon after specific reduction of the selenite by /-ascorbic acid. The total selenium content is determined after refluxing the water samples with thiourea in sulfuric acid medium and subsequent adsorption of the elemental form. The contribution of hexavalent selenium is obtained by subtraction. All of the experimental reduction reaction parameters have been optimized and the influence of humic material, salts, and oxidizing substances is investigated. The limit of detection is 50 ng L-1 for the tetravalent selenium and 60 ng L~1 for the total selenium content. The coefficient of variation amounts to approximately 10% for both species at the 0.5-1 pg Se L~1 level. The suspended material can easily be analyzed separately.

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Section: Vacuum-ultraviolet Atomic Absorption Spectrometry Of Mercury...mentioning

confidence: 99%

“…The procedure, which has been applied most commonly for the determination of selenium, involves coprecipitation followed by spectrophotometry (5)(6)(7)(8)(9)(10). Coprecipitation by iron(III) hydroxide is most frequently cited for the separation of selenium (5,6).…”

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confidence: 99%