Souri E, Kaboodari A, Adib N, Amanlou M. A New extractive spectrophotometric method for determination of rizatriptan dosage forms using bromocresol green.
ACTA ACUST UNITED AC 2013;
21:12. [PMID:
23374246 PMCID:
PMC3608254 DOI:
10.1186/2008-2231-21-12]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Accepted: 01/26/2013] [Indexed: 11/14/2022]
Abstract
Background and the purpose of the study
Rizatriptan is used effectively for the treatment of migraine headache. In this study, a simple, rapid and low cost spectrophotometric method based on the ion-pair complexation is proposed for the determination of rizatriptan in raw material and dosage forms.
Methods
The ion-pair complexation using bromocresol green as reagent was performed in a buffer solution and the absorbance was measured by a spectrophotometer. The ion-pair formation conditions were optimized and the accuracy and precision of the method were calculated.
Results and major conclusion
Best results were achieved by using 6 ml of the bromocresol green reagent in the presence of phosphate buffer (pH 3.0). The stoichiometry of the resulted complex was 1:1. The within-day and between-day precision values were lower than 2.9 and 1.8 percent for the calibration range of 0.5–50 and 10–100 μg/ml, respectively. The proposed method was successfully used for the determination of rizatriptan in dosage forms without any interference.
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