ULTRAFILTRATION DETERMINATION OF STABILITY-CONSTANTS FOR ZINC-COMPLEXES OF NATURAL-WATER HUMIC SUBSTANCES

Authors
NIFANTEVA TI FEDOROVA OV SHKINEV VM SPIVAKOV BY
Citation
Ti. Nifanteva et al., ULTRAFILTRATION DETERMINATION OF STABILITY-CONSTANTS FOR ZINC-COMPLEXES OF NATURAL-WATER HUMIC SUBSTANCES, Journal of analytical chemistry, 53(7), 1998, pp. 645-648
Citations number
16
Categorie Soggetti
Chemistry Analytical
Journal title
Journal of analytical chemistry → ACNP
ISSN journal
10619348
Volume
53
Issue
7
Year of publication
1998
Pages
645 - 648
Database
ISI
SICI code
1061-9348(1998)53:7<645:UDOSFZ>2.0.ZU;2-6
Abstract
It is shown that stability constants for metal complexes of humic subs tances can be determined by ultrafiltration combined with the fraction ation of the test sample. The stability constants for zinc complexes o f humic substances are determined for three fractions of two samples o f natural-water humic substances. It is demonstrated that most stable metal complexes are formed by humic substances contained in the fracti on retained by a membrane with a nominal molecular mass of 10(5) The c alculated overall stability constants agree with the data reported in the literature.