期刊
CENTRAL EUROPEAN JOURNAL OF CHEMISTRY
卷 8, 期 6, 页码 1244-1250出版社
VERSITA
DOI: 10.2478/s11532-010-0103-2
关键词
Atomic absorption analysis; Solid samples; Flame-furnace atomizer; Kinetic study
资金
- State Fund of Fundamental Research of Ministry of Education and Science of Ukraine
Direct solid sampling analysis in atomic absorption spectrometry using flame-furnace atomizer allows to significantly decrease analysis duration, to avoid sample pollution and to exclude toxic reagents. The choice of chemical modifiers that decreases the detection limit and improves the repeatability of results is based on the mechanism of analyte-free atom formation. The kinetic approach developed here allows determination of pre-exponential factors k(0) and apparent activation energies E(a) of the atomization processes for Pb(II) and Cd(II) compounds and enables use of CaCO(3) and KHF(2) as effective chemical modifiers for soil samples. A fast and precise technique for lead and cadmium determination in soils using the proposed chemical modifiers was developed.
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