防晒用品防晒性能的物理方法测试

Testing the ultravioletproof ability of the sunscreens by the physical method

采用物理测量透过率的方法,用分光光度计测定了一些防晒产品的紫外线透过率.测试结果表明,目前国内生产的一些防晒产品对中短波段的紫外线具有防护作用,但缺乏防长波段紫外线的功能.与生物学方法相比,物理方法可以直接、快速地测定紫外线防护用品的防紫外线能力,有利于制定统一的防晒标准.

The ultravioletproof ability of sunsereens can be tested directly, swiftly and accurately by pectrophotometer. A set of samples of sunscreens was tested adopting the method testing thansmission rate. The results proved that homemade many sunscreens can not proof ultraviolet ray A（UVA）. The physical method is more swiftness and more precise than biological one.