PRECIPITATION SEPARATION OF LEAD AND CALCIUM, STRONTIUM, BARIUM FROM ACIDIC SOLUTIONS USING CROWN-ETHER AND TUNGSTOSILICIC ACID

Authors
SVEC V MIKULAJ V HANZEL R
Citation
V. Svec et al., PRECIPITATION SEPARATION OF LEAD AND CALCIUM, STRONTIUM, BARIUM FROM ACIDIC SOLUTIONS USING CROWN-ETHER AND TUNGSTOSILICIC ACID, Journal of radioanalytical and nuclear chemistry, 208(2), 1996, pp. 487-497
Citations number
7
Categorie Soggetti
Chemistry Analytical","Nuclear Sciences & Tecnology","Chemistry Inorganic & Nuclear
Journal title
Journal of radioanalytical and nuclear chemistry → ACNP
ISSN journal
02365731
Volume
208
Issue
2
Year of publication
1996
Pages
487 - 497
Database
ISI
SICI code
0236-5731(1996)208:2<487:PSOLAC>2.0.ZU;2-H
Abstract
It was found that lend reacts with 18-crown-6 (L) and tungstosilicic a cid (H(4)A) in acidic solutions and a compound with low solubility is formed what was confirmed by radiometric titration methods. Coprecipit ation of complexion cation of PbL2+ with similar complexion cations of calcium, strontium and barium wets studied. Formation of law soluble salts was utilized for separation of Pb from Ca, Sr and Ba from 1 mol. dm(-3) HNO3. The ratio of Pb/Ca, Pb/Sr and Pb/Ba in the precipitation or separation factors S-Pb/M undoubted depends on the ratio of the sta bility constants of lead and metals with 18C6 (beta(Pb)/beta(M)), what call be used for determination of mure precise constant stability bet a(M).