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Photometric Determination of Cu<sup>2+</sup> Ion Using Octabromo-tetrakis(4-methylpyridyl)porphine.
MedLine Citation:
PMID:  22864355     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Octabromo-tetrakis(4-methylpyridyl)porphine (OBTMPyP), an octabromonated compound with 4 pyrole rings of tetrakis(4-methylpyridyl)porphine, selectively forms a complex with Cu<sup>2+</sup> ions at pH 2.0. When 3.6×10<sup>-5</sup> mol/L OBTMPyP was added to the reaction mixture, the calibration curve showed good linearity for Cu<sup>2+</sup> ions ranging from 0.01-2.2 µg (addition of 1.0 mL). A good coefficient of variation (Cu<sup>2+</sup>ions=1.5 µg (addition of 1.0 mL), n=10, 0.8%) was obtained. The molar absorption coefficient (ε) based on Cu<sup>2+</sup> ions was 8.5×10<sup>4</sup> L/mol•cm. This value was 6-fold greater than that determined with a clinical chemical analysis kit using the bathocuproine sulfonic acid method, which is a well-known method for spectrophotometric determination of the Cu<sup>2+</sup> ion concentration. A deproteination method was successfully applied in the clinical analysis kit for determination of Cu<sup>2+</sup> ion concentrations in control serum I, and the values determined using this method and the bathocuproine sulfonic acid method were almost the same.
Authors:
Masaki Mifune; Akimasa Iwado; Sinichiro Kamino; Shuichi Enomoto
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan     Volume:  132     ISSN:  1347-5231     ISO Abbreviation:  Yakugaku Zasshi     Publication Date:  2012  
Date Detail:
Created Date:  2012-08-06     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0413613     Medline TA:  Yakugaku Zasshi     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  953-8     Citation Subset:  IM    
Affiliation:
Division of Pharmaceutical Sciences, Graduate School of Medicine and Dentistry and Pharmaceutical Sciences, Okayama University.
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