Journal : Acta Chromatographica
Article : Densitometry, video-scanning and capillary electrophoresis for determination of valsartan and amlodipine in a combined dosage form: A comparative study

Authors :
Petruczynik, A.
Medical University of Lublin Department of Inorganic Chemistry 4a Chodźki Str. 20-093 Lublin Poland, annapetruczynik@poczta.onet.pl,
Waksmundzka-Hajnos, M.
Medical University of Lublin Department of Inorganic Chemistry 4a Chodźki Str. 20-093 Lublin Poland,
Rykowska, I.
Adam Mickiewicz University Faculty of Chemistry Umultowska 89b 61-614 Poznań Poland, obstiwo@amu.edu.pl,
Wasiak, W.
Adam Mickiewicz University Faculty of Chemistry Umultowska 89b 61-614 Poznań Poland,
Inglot, T. W.
Medical University of Lublin Department of Medicinal Chemistry, Faculty of Pharmacy Jaczewskiego 4 20-090 Lublin Poland,
Gumieniczek, A.
anna.gumieniczek@am.lublin.pl,
Komsta, Ł.
Medical University of Lublin Department of Medicinal Chemistry, Faculty of Pharmacy Jaczewskiego 4 20-090 Lublin Poland,
Związek, R.
Medical University of Lublin Department of Medicinal Chemistry, Faculty of Pharmacy Jaczewskiego 4 20-090 Lublin Poland,
Abstract : Comparison of classical densitometry, video-scanning, and capillary electrophoresis was performed for determination of angiotensin II receptor antagonist, valsartan, and calcium channels blocker, amlodipine, in a combined dosage form. Thin layer chromatography was performed on RP8F254 TLC plates with a mobile phase consisting of acetonitrile-phosphate buffer at pH 9.0 (5:5, v/v) and temperature 20 °C. Densitometry was done in the reflectance mode at 217 nm for valsartan and in the absorbance mode at 370 nm for amlodipine. Video-scanning was elaborated at 254 and 366 nm for valsartan and amlodipine, respectively. For chromatographic analysis, calibration plots were constructed in the range of 0.4–2.8 μg per spot for valsartan and 0.02–0.14 μg per spot for amlodipine. Capillary electrophoresis (CE) was performed using a 75 μm × 94 cm fused silica capillary (72 cm effective length), 0.01 mol L-1borate buffer at pH 8.0, 20 kV voltage, 30 °C temperature, hydrodynamic injection (10 mbar, 6 s) and UV detection at 237 nm. Calibration plots were constructed in the range of 0.1–0.6 mg mL-1for valsartan and 0.005–0.03 mg mL-1for amlodipine. All methods were validated in respect to robustness, specificity, stability, linearity, precision, and accuracy. Generally, statistical comparison between the methods did not show significant differences so all procedures are suitable for pharmaceutical analysis.

Keywords : densitometry, video-scanning, capillary electrophoresis, combined dosage form, statistical comparison,
Publishing house : University of Silesia in Katowice
Publication date : 2013
Number : Vol. 25, no. 1
Page : 47 – 58

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DOI :
Qute : Petruczynik, A. ,Waksmundzka-Hajnos, M. ,Rykowska, I. ,Wasiak, W. ,Inglot, T. W. ,Gumieniczek, A. ,Komsta, Ł. ,Związek, R. ,Związek, R. , Densitometry, video-scanning and capillary electrophoresis for determination of valsartan and amlodipine in a combined dosage form: A comparative study. Acta Chromatographica Vol. 25, no. 1/2013
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