Chromatographic determination of active compounds in topical formulations?

Analytical Methods Pub Date: 2011-09-20 DOI: 10.1039/C1AY05336A

Abstract

The aim of this study was to develop and validate new methods for the determination of active compounds in topical gels. The method for the determination of nonoxinol-9 and trimecaine hydrochloride in lubricant gel by HPLC with UV detection was described. Separation was carried out using a Discovery ZR-PBD analytical column (150 × 4.6 mm, 5 μm), and a mobile phase composed of a mixture of triethylammonium acetate buffer (pH 9; 50 mM) and methanol (22?:?78, v/v). Determination of terpinen-4-ol in lubricant gel was achieved by GC with a flame ionization detector (FID). An Alltech-AT-624 (0.32 mm ID × 30 m, 1.8 μm film thickness) fused-silicacapillary column and helium as the carrier gas, at a flow rate of 28 cm s?1, were employed. The analysis time was less than 7.5 min for HPLC and 5 min for GC analyses. Both methods were successfully applied to the analysis of pharmaceuticals.

Graphical abstract: Chromatographic determination of active compounds in topical formulations
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