Extractants selection for hyphenated electrothermal atomic absorption method

• Autorzy: Antonina Alemasova , Natalya Alemasova , Alexander Pupyshev
• Języki publikacji: EN

Abstrakty

EN

The theoretical approach for extractants selection during hyphenated atomic absorption determination of highly volatile metals (Pb, Cd), hydride- (Sb, Bi) and carbide-forming (Cr) metals using thermodynamic modelling was proposed. The calculated parameter - maximum pyrolysis temperature - can be used for selection of the extractants and chemical modifiers. Using this approach the antimony extract with Brilliant green was modified for which the 1.8-fold sensitivity and 2.6-fold repeatability decreasing while extract sampling in graphite furnace was observed. A chemical modifier - mixture of hydrazine nitrate with the palladium(II) complex with Xylenol orange - was theoretically selected and experimentally tested, which allowed to enhance the maximum pyrolysis temperature on 200°C, to eliminate extract matrix influence. Using this modifier two-fold increasing in sensitivity and 3-fold decreasing in relative standard deviation was achieved while extraction atomic absorption determination. [...]

Słowa kluczowe

EN

Hyphenated Extraction Atomic Absorption Method; Thermodynamic Modeling

• Czasopismo: Open Chemistry
• Rocznik: 2013
• Tom: 11
• Numer: 11
• Strony: 1852-1859

Daty

wydano

2013-11-01

online

2013-08-25

Twórcy

autor

Antonina Alemasova

• Faculty of Chemistry, The Donetsk National University, 83000, Donetsk, Ukraine,

autor

Natalya Alemasova

• Faculty of Chemistry, The Donetsk National University, 83000, Donetsk, Ukraine

autor

Alexander Pupyshev

• Faculty of Chemistry, The Ural Federal University, 620002, Ekaterinburg, Russia

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Identyfikatory

DOI

10.2478/s11532-013-0317-1