Design of Experiments Based Validated HPTLC Method for Quantification of Oxybenzone and Avobenzone in Personal Care Products

A rapid, simple and economic High Performance Thin Layer Chromatography (HPTLC) method for the simultaneous quantification of Oxybenzone and Avobenzone in various personal care products available in local markets in and around Chennai is developed and validated. Central Composite design (CCD) with three factors and one response was employed to study the robustness of the developed method. The best chromatographic separation was achieved employing Toluene: Acetonitrile: Ethyl acetate (4: 5: 1 v/v/v) as solvent system. Densitometric analysis was carried out at 332 nm. The developed method is examined for validation parameters like linearity, specificity, precision, accuracy and robustness. The method was found linear over a wide range of 2.5 – 200 ng/band with a regression coefficient of 0.9998 and 0.9991 for Oxybenzone and Avobenzone respectively. All the validation parameters were found to be within the acceptance limit. The proposed and developed HPTLC method can be applied for routine analysis of Oxybenzone and Avobenzone, in the presence of other excipients in cosmetic products and can also be extended to analysis in pharmaceuticals and food products.