期刊
JOURNAL OF ANALYTICAL CHEMISTRY
卷 67, 期 2, 页码 140-143出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1061934811120021
关键词
equilibrium; rhodium(III); ethylenediaminetetraacetic acid
资金
- Russian Foundation for Basic Research [09-03-01041, 10-03-01198-a]
Equilibria in the solutions of the rhodium(III) complex of EDTA (H4Y) are studied by means of electronic absorption spectrometry. Mathematical treatment of the spectra provided the estimation of the parameters of spectral bands for two complexes [Rh(Y)(H2O)](-) (lambda(max) = 302 +/- 2 and 371 +/- 2 nm; E >(max) = 265 +/- 3 and 275 +/- 3 L/(cm mole), respectively) and [Rh(Y)](-) (lambda(max) = 289 +/- 2 and 353 +/- 2 nm; E >(max) = 240 +/- 3 and 415 +/- 5, respectively). The equilibrium constant [Rh(Y)(H2O)](-) ai [Rh(Y)](-) is estimated at pK (eq) = -2.7 +/- 0.2. The description of the calculation procedure is provided.
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