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Rh(iii) hydroxocomplexes speciation using HPLC-ESI-MS

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Abstract

A mixture of rhodium(III) hydroxocomplexes formed during the polycondensation process in alkaline media has been fully characterized by the hyphenated high performance liquid chromatography with electrospray ionization mass spectrometry (HPLC-ESI-MS). The baseline separation was achieved using reverse phase ion-pair chromatography (RP-IP-HPLC) in gradient elution mode. When using SDS as the ion pair, the formation of all types of its associates with the molecules of acetonitrile, as well as oligomers of rhodium aquahydroxocomplexes, etc. was taken into consideration. As a result, it was shown that the test mixture is presented by [Rh(H2O)6]3+, [Rh2(μ-OH)2(H2O)8]4+, [Rh3(μ-OH)4(H2O)10]5+, [Rh4(μ-OH)6(H2O)12]6+.

Graphical abstract: Rh(iii) hydroxocomplexes speciation using HPLC-ESI-MS

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Supplementary files

Article information


Submitted
20 Feb 2020
Accepted
30 Apr 2020
First published
04 May 2020

Anal. Methods, 2020, Advance Article
Article type
Paper

Rh(III) hydroxocomplexes speciation using HPLC-ESI-MS

V. V. Volchek, S. N. Berdyugin, O. V. Shuvaeva, D. G. Sheven, D. B. Vasilchenko and S. V. Korenev, Anal. Methods, 2020, Advance Article , DOI: 10.1039/D0AY00363H

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