Academic Journals Database
Disseminating quality controlled scientific knowledge

Application of bromate-bromide mixture as a green brominating agent for the spectrophotometric determination of atenolol in pharmaceuticals

ADD TO MY LIST
 
Author(s): Prashanth Nagaraj Kudige | Basavaiah Kanakapura | Abdulrahman Sameer A.M. | Rajendraprasad Nagaraju | Vinay Basavaiah Kanakapura

Journal: Chemical Industry and Chemical Engineering Quarterly
ISSN 1451-9372

Volume: 18;
Issue: 1;
Start page: 43;
Date: 2012;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

Keywords: atenolol | assay | bromate-bromide mixture | spectrophotometry | pharmaceuticals

ABSTRACT
Two highly sensitive spectrophotometric methods are proposed for the quantification of atenolol (ATN) in pure drug as well as in pharmaceutical formulations. The methods are based on the bromination reaction of ATN with a known excess of bromate-bromide mixture in acid medium followed by the determination of unreacted bromine. The residual bromine is determined by its reaction with excess iodide and the liberated iodine (I3□) is either measured at 360 nm (method A) or reacted with starch followed by the measurement of the starch-iodine chromogen at 570 nm (method B). Under the optimum conditions, ATN could be assayed in the concentration ranges of 0.5-9.0 and 0.3-6.0μg mL-1 for method A and method B, respectively, with corresponding molar absorptivity values of 2.36×104 and 2.89×104 L/mol.cm. Sandell’s sensitivity values are found to be 0.0113 and 0.0092 μg/cm2 for method A and method B, respectively. The proposed methods were successfully applied to the analysis of different commercial brands of pharmaceutical formulations and the results obtained by the proposed methods were in good agreement with those obtained using the reference method. The reliability of the methods was further ascertained by recovery studies using standard- addition method.
Affiliate Program      Why do you need a reservation system?