Document Detail

An ion-exchange separation of metal cations on a C-18 column coated with dodecylsulphate.
MedLine Citation:
PMID:  18965334     Owner:  NLM     Status:  In-Data-Review    
The retention mechanism was studied for the cations of the alkaline earth metals and Zn(2+) Ni(2+), Co(2+), Cd(2+) and Bi(3+) on a C(18) column permanently coated with sodium dodecylsulphate, with aqueous mobile phases containing cupric chloride or sulphate, or cerous nitrate. The dependencies of the logarithm or the capacity ratio on the logarithm of the eluent concentration were linear, demonstrating that ion-exchange was the predominating separation mode; the slopes of these dependencies were in good agreement with the values predicted from the ion-exchange theory. Indirect UV photometric detection yielded limits of detection (LOD) of 21, 44, 120 and 275 ng in the volume injected, 20 mul, for Mg(2+), Ca(2+), Sr(2+) and Ba(2+), respectively, with the 10(-2)M copper(II) chloride mobile phase; the respective LOD values decreased to 0.8, 1.6, 3.0 and 6.7 ng with the 5 x 10(-4)M cerium(III) nitrate eluent. The method was found to be primarily suitable for determination of the alkaline earths and was applied to analyses of surface and mineral waters.
P Janos; K Stulík; V Pacáková
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Talanta     Volume:  39     ISSN:  0039-9140     ISO Abbreviation:  Talanta     Publication Date:  1992 Jan 
Date Detail:
Created Date:  2008-10-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  29-34     Citation Subset:  -    
The Research Institute of Inorganic Chemistry, 400 60 Ustí nad Labem, Czechoslovakia.
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