Multivariate optimization and validation of an analytical methodology by RP-HPLC for the determination of losartan potassium in capsules
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Data
2009-11-15
Autores
Bonfilio, Rudy
Teixeira Tarley, Cesar Ricardo
Pereira, Gislaine Ribeiro
Salgado, Hérida Regina Nunes [UNESP]
de Araujo, Magali Benjamim
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Editor
Elsevier B.V.
Resumo
This paper describes the optimization and validation of an analytical methodology for the determination of losartan potassium in capsules by HPLC using 2(5-1) fractional factorial and Doehlert designs. This multivariate approach allows a considerable improvement in chromatographic performance using fewer experiments, without additional cost for columns or other equipment. The HPLC method utilized potassium phosphate buffer (pH 6.2: 58 mmol L(-1))-acetonitrile (65:35, v/v) as the mobile phase, pumped at a flow rate of 1.0 mL min(-1). An octylsilane column (100 mm x 4.6 mm W., 5 mu m) maintained at 35 degrees C was used as the stationary phase. UV detection was performed at 254 nm. The method was validated according to the ICH guidelines, showing accuracy, precision (intra-day relative standard deviation (R.S.D.) and inter-day R.S.D values <2.0%). selectivity, robustness and linearity (r=0.9998) over a concentration range from 30 to 70 mg L(-1) of losartan potassium. The limits of detection and quantification were 0.114 and 0.420 mg L(-1), respectively. The validated method may be used to quantify losartan potassium in capsules and to determine the stability of this drug. (C) 2009 Elsevier B.V. All rights reserved.
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Palavras-chave
Doehlert design, Fractional factorial design, Losartan potassium, Reversed-phase chromatography, Validation
Como citar
Talanta. Amsterdam: Elsevier B.V., v. 80, n. 1, p. 236-241, 2009.