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New HPLC Method with Experimental Design and Fluorescence Detection for Analytical Study of Antihypertensive Mixture, Amlodipine and Valsartan

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DOI: 10.4236/ajac.2013.41003    5,657 Downloads   9,849 Views   Citations

ABSTRACT

New HPLC method was developed for determination of amlodipine and valsartan in their binary mixture as a part of routine control of combined formulations. The method was validated to meet official requirements including selectivity, stability, linearity, precision and accuracy. Chromatography was carried out using a LiChrospher RP-18 column, a mixture containing acetonitrile, phosphate buffer of pH 3.5 and methanol (45:45:10, v/v/v) and new fluorescence detection at 255 nm for excitation and 448 nm for emission. The effect of methanol content, pH of the buffer, flow rate, detection wavelengths and column temperature was estimated in robustness study, according to a plan defined by the Plackett-Burman design. For identification of significant effects, both graphical and statistical methods were used. Ro-bustness for dissolution test was checked estimating the effects of paddle speed, temperature and pH of dissolution medium. The method was proved to complying with all official guidelines. Therefore, it is suitable for determination of amlodipine and valsartan in their binary mixtures for different analytical and pharmaceutical purposes.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

T. Inglot, A. Gumieniczek, P. Mączka and E. Rutkowska, "New HPLC Method with Experimental Design and Fluorescence Detection for Analytical Study of Antihypertensive Mixture, Amlodipine and Valsartan," American Journal of Analytical Chemistry, Vol. 4 No. 1, 2013, pp. 17-23. doi: 10.4236/ajac.2013.41003.

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