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Validated HPTLC Method for Simultaneous Estimation of Isotretinoin and Erythromycin in Bulk Drug and Topical Gel Form

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DOI: 10.4236/ajac.2010.13018    5,670 Downloads   11,948 Views   Citations

ABSTRACT

A simple, precise and accurate high performance thin layer chromatographic method has been developed for the simultaneous estimation of Isotretinoin and Erythromycin in pharmaceutical gel. The separation was carried out on Merck TLC aluminum sheets of silica gel 60 F254, (20 × 10 cm) with 250 µm thickness using toluene: DMSO: methanol (6.5:0.2:2.5, v/v/v) as a mobile phase. HPTLC separation of the two drugs followed by densitometric measurement of their spots at 340 nm for Isotretinoin before derivatization and 410 nm for Erythromycin after derivatization with 10% H2SO4 and heating at 100°C for 15 min. The drugs were satisfactorily resolved with RF values of 0.38 ± 0.02 and 0.55 ± 0.02 for Isotretinoin and Erythromycin, respectively. The accuracy and reliability of the method was assessed by evaluation of linearity (30-150 ng spot-1 for Isotretinoin and 1200-6000 ng spot-1 for Erythromycin), precision (intra-day RSD 0.62-0.79% and inter-day RSD 0.43-0.71 % for Isotretinoin and intra-day RSD 0.47-1.71 % and inter-day RSD 0.42-1.49 % for Erythromycin), accuracy (98.91 ± 0.92 % for Isotretinoin and 99.27 ± 0.72 % for Erythromycin), and specificity, in accordance with ICH guidelines.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

A. Rathore, L. Sathiyanarayanan and K. Mahadik, "Validated HPTLC Method for Simultaneous Estimation of Isotretinoin and Erythromycin in Bulk Drug and Topical Gel Form," American Journal of Analytical Chemistry, Vol. 1 No. 3, 2010, pp. 144-149. doi: 10.4236/ajac.2010.13018.

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