Abstract
For quantitative analysis of UV absorber in sunscreen products, a simultaneous determination with high performance liquid chromatography (HPLC) is useful. Many studies on simultaneous determination have been reported. However, most authors adopt a gradient method that is not appropriate for routine analysis, due to the long time needed to stabilize the system after returning the solvent condition to the default before the next sample injection. Herein, we propose an isocratic method, using HPLC on a C30 column. We apply the approach in the simultaneous determination of seven UV absorbers in cosmetic products, and demonstrate that it is an accurate, simple, and effective detection method.
