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HERO ID
7755597
Reference Type
Journal Article
Title
Spectral and extraction study of Cd DTC chelates
Author(s)
Oktavec, D; Lehotay, J; Vrabel, V
Year
2001
Is Peer Reviewed?
Yes
Journal
Chemical Papers / Chem Zvesti
ISSN:
0366-6352
EISSN:
1336-9075
Publisher
VERSITA
Location
WARSAW
Volume
55
Issue
4
Page Numbers
233-238
Language
English
Web of Science Id
WOS:000171493900005
Abstract
The absorption spectra in the range of λ = 200-350 nm and IR spectra in the range of Î½Ì = 200-1700 cm-1 of cadmium(II) dithiocarbamate chelates are described. The values of the molar absorptivity of the absorption bands of chelates with ligands derived from diethyl-, dipropyl-, diisopropyl-, dibutyl-, diisobutylamine and piperidine around 260 nm and 280 nm were determined in the range 24900-32000 dm3 mol-1 cm-1 or 13500-21400 dm3 mol-1 cm-1. On the basis of spectral properties there is a dependence of the values of ε and λmax at about 265 nm (this wavelength is recommended for the spectrophotometric determination of cadmium) on alkyl substituents in the dithiocarbamate ligand. The influence of the solvent polarity on the shift of λmax, the influence of alkyl substituents in the dithiocarbamate ligands on the values of wavenumber of their normal vibrations, and the influence of the central atom on the intensity of the absorption band at approximately 265 nm and the efficiency of the extraction are discussed. Chloroform extraction curves of Cd(II) chelates under investigation are drawn in the range of pH 1-11. The optimal pH values for determination of Cd(II) in the form of dithiocarbamate complexes and detection limits of Cd spectrometric determination are given.
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