Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 183: Issue 1
Precipitation separation of strontium and calcium from acidic solutions using crown ether and tungstosilicic acid
Authors:
V. Mikulaj Comenius University Department of Nuclear Chemistry Mlynská Dolina Ch-1 842 15 Bratislava (Slovakia)

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and
V. Švec Comenius University Department of Nuclear Chemistry Mlynská Dolina Ch-1 842 15 Bratislava (Slovakia)

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Pages:
127–133
Online Publication Date:
14 Aug 2005
Publication Date:
17 Sep 1994
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02043125
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Abstract  

Strontium forms a compound of composition (SrL)2A·nH2O with low solubility (5.0·10–6 mol Sr·dm–3) in the presence of 18-crown-6 (L) and tungstosilicic acid (H4A) in acid media, as has been found by radiometric precipitation titration. Formation of the compound with limited solubility was used for separation of strontium and calcium from 1 mol·dm–3 HCl. It is possible to separate strontium in the range from trace to 6 mmol·dm–3 in the presence of calcium with its concentration up to 0.2 mol ·dm–3 and the recovery determined was 95% of Sr and 5% Ca or 90% of Sr and 4% Ca, respectively. The ratio of Sr/Ca depends on the stability constants ratio of metal-L (⊃SR/⊃ca) in the case of gradual addition of L. Potassium up to the concentration of 0.05 mol·dm–3 does not influence recovery of strontium.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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