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Determination of manganese (II) in some medicinal plants and their decoctions by a kinetic spectrophotometric method
Author(s) -
Mutaftchiev Konstantin,
Tzachev Kamen
Publication year - 2003
Publication title -
phytochemical analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 72
eISSN - 1099-1565
pISSN - 0958-0344
DOI - 10.1002/pca.698
Subject(s) - potassium periodate , chemistry , manganese , detection limit , absorbance , decoction , catalysis , trace amounts , spectrophotometry , nuclear chemistry , potassium , inorganic chemistry , chromatography , organic chemistry , traditional medicine , medicine , alternative medicine , pathology
The catalytic effect of manganese (II) on the oxidation of the azo dye tropaeolin 00 with potassium periodate in the presence of 1,10‐phenanthroline was investigated. The reaction was followed spectrophotometrically by measuring the decrease in the absorbance of the azo dye at 445 nm. Under the optimum analytical conditions, manganese (II) in the range 0.05–2.5 ng/mL could be determined by the fixed‐time method with a detection limit of 0.02 ng/mL. The developed method is highly sensitive, selective and simple, and was applied successfully to analyse decoctions of some medicinal plants for trace amounts of total manganese (II) and free manganese (II) ions without separation. Copyright © 2003 John Wiley & Sons, Ltd.