I. Kojima, M. Katsuzaki
Dec 1, 1997
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0
Influential Citations
18
Citations
Journal
Analytical Sciences
Abstract
For the selective extraction of silver as a ternary complex in the presence of a bulky counter ion, such as picrate ion, thiacrown ethers'-4 and acyclic polythiaalkanes5-8 are recommended as extractants. Perchlorate ion is also used as a bulky counter anion in the extraction of a cationic metal complex. Perchloric acid is frequently used as a powerful oxidizing agent for the wet-digestion of biological samples. Thus, the direct extraction of a cationic metal complex-C104associate from the digested sample solution could be the simplest and the most convenient way to separate a trace metal of interest. By one-drop flame atomic absorption spectrometry (FAAS) with the direct nebulization of 50 μl of the organic extract into a fuel-lean air-acetylene flame, some elements9-' 1 have been sensitively determined without any background correction. The present paper describes the selective extraction of silver with commercially available 3,6-dithiaoctane (8-2S) from a 0.5 mol dm 3 HC104 solution and the onedrop FAAS of silver in three zoological and six botanical standard reference materials without a deuterium background correction.