TiO2 in commercial sunscreen lotion:: Flow field-flow fractionation and ICP-AES together for size analysis
TiO2 in commercial sunscreen lotion:: Flow field-flow fractionation and ICP-AES together for size analysis
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DOI：
10.1021/ac8012626
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发表时间：
2008-10-01
影响因子：
7.4
通讯作者：
Pagnoni, Antonella
中科院分区：
文献类型：
--
作者：
Contado, Catia;Pagnoni, Antonella
提出了一种测定二氧化钛颗粒大小的新方法，并在商业防晒产品中进行了测定。今天，许多防晒化妆品都含有物理紫外线过滤剂作为活性成分，并且没有官方方法来确定防晒化妆品中的这些化合物。在这里，流场流分级（F1 FFF）已被测试，首先分选两种不同类型的TiO 2纳米和微米标准物质（AeroxideTiO（2）Degussa。P-25和TiO 2金红石0.1-0.2 μ m尺寸），然后破碎TiO 2颗粒，从商业防晒乳液中提取。所有TiO 2 F1 FFF分离物均通过UV检测，但在洗脱过程中收集级分，并通过电感耦合等离子体原子发射光谱仪（ICP-AES）测量其Ti含量; ICP-AES获得的Ti浓度分布与UV信号纬相关。该方法相对简单、快速，样品处理总体上容易且成本低。
A new method for determining the size of titanium dioxide particles is proposed and assayed in a commercial sunscreen product. Today many sun protection cosmetics incorporate physical UV filters as active ingredients, and there are no official methods for determining these compounds in sunscreen cosmetics. Here flow field-flow fractionation (F1FFF) has been tested, first to sort two different types of TiO2 nano- and microstandard materials (AeroxideTiO(2) Degussa. P-25 and TiO2 rutile 0.1-0.2-mu m size) and then to fractionate TiO2 particles, extracted from a commercial sunscreen lotion. All the TiO2 F1FFF separations were detected by UV but during elution fractions were collected and their Ti content measured by inductively coupled plasma-atomic emission spectrometer (ICP-AES); the Ti concentration profiles obtained by ICP-AES were weft correlated with the UV signals.The TiO2 particle mass-size distribution were calculated from the UV profiles. This methodology is relatively simple and rapid, and the sample treatment is as a whole easy and low cost.