Key points are not available for this paper at this time.
Abstract Background Titanium dioxide (TiO 2 ), a white powder, represents the opacifier used in many products, including drugs, foods, cosmetics, paints, and dyes. Method The Uv‐Vis spectrophotometry was a particularly suitable technique to quantify TiO 2 in the solutions obtained from cosmetics. In this work, we determined the TiO 2 content in a total of 88 samples of eye shadows and face powders of different brands and costs. Before to analyse the samples, we developed the mineralization and analysis method, in fact, fusion with potassium bisulphate would be very laborious because it must be carried out on one sample at a time and requires very long times, instead, the mineralization with the acid mixture and the aid of microwaves allowed us to solubilize six samples at the same time within 45 min. Results From the results obtained, we can state that the highest concentrations of TiO 2 are found in the eyeshadows with a maximum value of 36% in a blue eyeshadow.
Amorello et al. (Wed,) studied this question.