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Spectrophotometric Determination of Metoclopramide and Oxybuprocaine Through Ion Pair Formation with Thiocyanate and Molybdenum(V) or Cobalt(II)

 

作者: FatmaM. Abdel-Gawad,   NabawiaM. El-Guindi,  

 

期刊: Analytical Letters  (Taylor Available online 1995)
卷期: Volume 28, issue 8  

页码: 1437-1447

 

ISSN:0003-2719

 

年代: 1995

 

DOI:10.1080/00032719508006405

 

出版商: Taylor & Francis Group

 

关键词: Metoclopramide;oxybuprocaine;ion pairs;spectrophotometry

 

数据来源: Taylor

 

摘要:

Two spectrophotometric methods involve the formation of two different ion pairs between the drug and inorganic complexes, Mo(V) and Co(II) thiocyanates followed by their extraction with dichlorømethane and o-nitrotoluene, respectively. The optimum conditions for the ion pair formation are established. The methods permit the determination of metoclopramide and oxybuprocaine hydrochlorides over a concentration range of 1-20 μg ml−1and 20–240 μg ml−1using Mo(V) and Co(II) thiocyanates, respectively. Molar ratio of drug to Mo(V) or Co(II) indicates a 2:1 ratio for the two drugs studied in the presence of excess thiocyanate concentration. Results of the analysis of drug substances and their dosage forms by the proposed methods are in good agreement with those obtained by the official methods.

 

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