Spectrophotometric Indirect Determination of Captopril through Redox Reaction with n-bromosuccinimide and RB dye in Pharmaceutical Products

ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY

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Title Spectrophotometric Indirect Determination of Captopril through Redox Reaction with n-bromosuccinimide and RB dye in Pharmaceutical Products
 
Creator Kokhasmail, Dashne M.
Tahir, Tara F.
Azeez, Kurdistan F.
 
Subject Captopril
Indirect determination
n-bromosuccinimide
Rhodamine B
Spectrophotometer
 
Description A simple, accurate, and sensitive method for the spectrophotometric determination of captopril in bulk and dosage forms is reported. The method is based on the bromination of captopril with excess solution of n-bromosuccinimide (NBS) in HCl acid medium. The excess NBS is pursued by the assessment of the residual NBS based on its ability to bleach the rhodamine B dye and measuring the absorbance at 555 nm. The amount of NBS reacted coincides to the drug content. The different experimental parameters influencing the development and stability of the color are precisely studied and optimized. Beer’s law is valid within a concentration range of 0.3–1.0 μg/mL with a correlation coefficient R2 = 0.991. The limit of detection 0.169 μg/mL is attained and relative standard deviation values for five replicated measurements of 0.3, 0.7, and 1.0 μg/mL captopril were between 0.53% and 2.03%. No interference is detected from prevalent additives found in pharmaceutical preparations. The proposed method is profitably put on to the determination of captopril in the tablet formulations with mean recoveries 98.91–101.27% and the results were statistically confronted with those of a reference method by applying Student’s t-and F-test.
 
Publisher Koya University
 
Date 2020-09-01
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed article
text
 
Format application/pdf
 
Identifier http://aro.koyauniversity.org/index.php/aro/article/view/ARO.10662
10.14500/aro.10662
 
Source ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY; Vol. 8 No. 2 (2020): Issue Fifteen; 8-14
2307-549X
2410-9355
 
Language eng
 
Relation http://aro.koyauniversity.org/index.php/aro/article/view/ARO.10662/183
 
Rights Copyright (c) 2020 Tara F. Tahir, Dashne M. Kokhasmail, Kurdistan F. Azeez
https://creativecommons.org/licenses/by-nc-sa/4.0
 

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