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Identification and Quantification of Intracoordination Water in Insoluble Pectinates Cu<sup>2+</sup> and Pb<sup>2+</sup>
Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
- 1 Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
- 2 Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
- 3 Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
- 4 Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
- 5 Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia
American Journal of Analytical Chemistry·Volume 08 (2017)·Pages 210–224·Published 1 March 2017·DOI10.4236/ajac.2017.83017
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Abstract
By derivatography in insoluble pectins Cu 2+ (РCu 2+ ) and Pb 2+ (РPb 2+ ), the presence of “a high-temperature component” (150°C - 165°C ) is established. During potentiometric alkalimetric titration of РCu 2+ and РPb 2+ , endpoints are established at рН accordingly 4.87 and 4.95, proving acid properties of PM. Obtained data show the presence of water in the internal sphere of PM. Considering the loss of this water and the known ratio of metal cations and monomers of pectin (L - ), the simplest formulas of pectins are established: [Cu(L - ) 2 (H 2 O) 2 ], [Pb(L - ) 2 (H 2 O) 4 ].
KeywordsCoordination ConnectionsPectinates of MetalsIons of Copper (II)Ions of Lead (II)CompositionDerivatographyPotentiometry
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