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Titrimetric determination of fluoride in some pharmaceutical products used for fluoridation.
MedLine Citation:
PMID:  18965409     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Two titrimetric methods were developed for the determination of fluoride contents in some pharmaceutical preparations used for fluoridation. One of the methods is catalytic controlled-current potentiometry involving two identical platinum indicator electrodes and thorium nitrate as titrant. The reaction between hydrogen peroxide and potassium iodide in the presence of acetate buffer (pH 3.6), which is catalysed by the excess of thorium nitrate, served for the end-point indication. The other method is the automatic potentiometric titration involving a fluoride-selective electrode and lanthanum nitrate as titrating agent. In both procedures, special attention was paid to sample pretreatment and to determination of optimal experimental conditions. Fluoride contents in the range 16-32 microg/ml are determined with a relative standard deviation less than 1.34%. The results are compared to those obtained by standard methods described in the United States Pharmacopeia XXI and recommended by the manufacturer of the preparations.
Authors:
B F Abramovi??; F F Ga??l; S D Cvetkovi??
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Talanta     Volume:  39     ISSN:  0039-9140     ISO Abbreviation:  Talanta     Publication Date:  1992 May 
Date Detail:
Created Date:  2008-10-30     Completed Date:  2009-12-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  511-5     Citation Subset:  -    
Affiliation:
Institute of Chemistry, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovi??a 3, Novi Sad, Yugoslavia.
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