Document Detail


Flow injection spectrophotometric or conductometric determination of ascorbic acid in a vitamin C tablet using permanganate or ammonia.
MedLine Citation:
PMID:  18967679     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Two simple flow injection (FI) procedures for the determination of ascorbic acid content in a vitamin C tablet are proposed: spectrophotometric involving injection into a stream of acidic potassium permanganate solution and monitoring its color change due to the redox reaction; FI conductometry based on the neutralization of ascorbic acid injected into a flowing ammonia solution yielding a change in conductivity. The procedures have been applied to the analysis of locally commercial vitamin C tablet samples. A through-put of at least 90 injections h(-1) can be achieved. The relative standard deviation was found to be 2.5% (for a 50 mg vitamin C tablet; n=7) for both. Results obtained by either procedure agree with a standard titrimetric method.
Authors:
K Grudpan; K Kamfoo; J Jakmunee
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Talanta     Volume:  49     ISSN:  0039-9140     ISO Abbreviation:  Talanta     Publication Date:  1999 Aug 
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:  1023-6     Citation Subset:  -    
Affiliation:
Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
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