背景:二氧化钛(TiO2),白色粉末,代表许多产品中使用的遮光剂,包括毒品,食物,化妆品,油漆,和染料。
方法:Uv-Vis分光光度法是定量从化妆品中获得的溶液中的TiO2的特别合适的技术。在这项工作中,我们确定了总共88个不同品牌和成本的眼影和面部粉末样品中的TiO2含量。在分析样品之前,我们开发了成矿和分析方法,事实上,与硫酸氢钾的融合将是非常费力的,因为它必须一次对一个样品进行,并且需要非常长的时间,相反,酸混合物的矿化作用和微波的帮助使我们能够在45分钟内同时溶解六个样品。
结果:从获得的结果来看,我们可以说,在眼影中发现最高浓度的TiO2,在蓝色眼影中的最大值为36%。
BACKGROUND: Titanium dioxide (TiO2), a white powder, represents the opacifier used in many products, including drugs, foods, cosmetics, paints, and dyes.
METHODS: The Uv-Vis spectrophotometry was a particularly suitable technique to quantify TiO2 in the solutions obtained from cosmetics. In this work, we determined the TiO2 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 TiO2 are found in the eyeshadows with a maximum value of 36% in a blue eyeshadow.