防晒霜透光率的测定及防晒指数分析

Measure of Sunscreen Cream Transmittance and Analysis of Sun Protection Factor

防晒指数SP F(Sun P rot ection F actor)是防晒用品的主要指标,本文利用紫外分光光度计测量市面常见各种品牌的不同SPF值的100个防晒霜样本在中波紫外线(UVB)的透光率,测量结果表明光谱分析方法可以有效地测量防晒霜SP F值,从而可以鉴别防晒霜上标示的SP F值是否准确。

Sun Protection Factor （SPF） is the important index of sunscreen products. The transmittance of 100 sunscreen cream samples with different SPF is measured by ultraviolet spectrophotometer in ultraviolet Radiation B （UVB） wavelength range. The measurement results show that the spectral analysis method can effectively measure the sunsereen cream SPF, thereby the method can shows whether the SPF labeled is credible.