UV Spectrophotometric Microdetermination of L-DOPA Based on Complex Formation with Copper(II)Ion
作者:
D. Pecanac,
K. Karljikovic-Rajic,
D. Radulovic,
期刊:
Analytical Letters
(Taylor Available online 1997)
卷期:
Volume 30,
issue 10
页码: 1833-1841
ISSN:0003-2719
年代: 1997
DOI:10.1080/00032719708001701
出版商: Taylor & Francis Group
关键词: L-DOPA;copper(II);complex;UV spectrophotometry;microdetermination;dosage forms
数据来源: Taylor
摘要:
The UV spectrophotometric investigations obtained for the reaction between L-DOPA and copper(II)ion contribute to the clarification of equilibrium conditions of the complex formation both in the excess of metal ion and ligand. For the complex obtained in the excess of copper(II)ion optimum conditions were established, as well as the stoichiometric composition (1:1) and conditional stability constant logK' = 5.70±0.05. The proposed method, using copper(II)ion, as the analytical reagent in excess, for the UV spectrophotometric determination is suitable for accurate, sensitive and selective analysis of L-DOPA both in pure and dosage forms containing benzerazide.
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