Extractants selection for hyphenated electrothermal atomic absorption method / Alemasova Antonina S.,Alemasova Natalya V.,Pupyshev Alexander A. // CENTRAL EUROPEAN JOURNAL OF CHEMISTRY. - 2013. - V. 11, l. 11. - P. 1852-1859.

ISSN/EISSN:

1895-1066 / нет данных

Type:

Article

Abstract:

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 degrees 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.

Author keywords:

Hyphenated Extraction Atomic Absorption Method; Thermodynamic Modeling SINGLE-DROP MICROEXTRACTION; SPECTROMETRIC DETERMINATION; PERMANENT MODIFIER; ORGANIC-SOLVENTS; CADMIUM; SAMPLES; LEAD; WATER; BEHAVIOR; SYSTEM

DOI:

10.2478/s11532-013-0317-1

Web of Science ID:

ISI:000324816000017

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	NOV
Publisher	VERSITA
Address	SOLIPSKA 14A-1, 02-482 WARSAW, POLAND
Language	English
Keywords-Plus	SINGLE-DROP MICROEXTRACTION; SPECTROMETRIC DETERMINATION; PERMANENT MODIFIER; ORGANIC-SOLVENTS; CADMIUM; SAMPLES; LEAD; WATER; BEHAVIOR; SYSTEM
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Multidisciplinary
Author-Email	pupyshev@dpt.ustu.ru
ORCID-Numbers	Pupyshev, Alexander/0000-0003-2484-5377
Number-of-Cited-References	26
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	9
Journal-ISO	Cent. Eur. J. Chem
Doc-Delivery-Number	223OP