防晒霜防晒系数的测定

Kinda Andrea, Berze Boglárka-Katalin, Fogarasi Erzsébet, Sipos Emese, Fülöp Ibolya
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引用次数: 0

摘要

适当的防晒在防止太阳紫外线辐射的有害影响方面起着关键作用。使用防晒产品可以保护皮肤免受晒伤,防止皮肤老化,降低患皮肤癌的风险。本研究的目的是测量市售产品的防晒系数(SPF),并将其与包装上的SPF值进行比较。我们还研究了防晒成分的比例和组合是否会影响产品的效果。测试了8种防晒产品的SPF值。该值是用紫外分光光度计测量吸光度的体外方法确定的。根据所得结果,利用Mansur公式计算出产品的实际SPF值。我们测定的SPF值与防晒产品包装上标示的值平均相差46.82%。对于那些包装上SPF值较高(SPF 50)的产品,观察到与测量值的较大偏差,但所有测试产品都观察到一些偏差。然而,产品中物质的组合和比例并不影响所获得的差异。
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Determination of the sun protection factor of sunscreens
Abstract Proper sun protection plays a key role in protecting against the harmful effects of UV radiation from the sun. Using sunscreen products protects the skin from sunburn, prevents it from ageing and reduces the risk of skin cancer. The aim of this research is to measure the sun protection factor (SPF) of commercially available products and compare it with the SPF value on the packaging. We also looked at whether the ratio and combination of sunscreen ingredients affect the effectiveness of the product. The SPF values of eight sun-screen products were tested. The value was determined using an in vitro method based on absorbance measurements with a UV spectrophotometer. Based on the results obtained, the actual SPF values of the products were calculated using Mansur’s formula. The SPF values we determined differed by 46.82% on average from the values indicated on the packaging of the sunscreen products. For those products where the SPF value on the packaging was higher (SPF 50), a larger deviation from the measured values was observed, but some deviation was observed for all products tested. However, the combination and proportion of substances in the products did not influence the differences obtained.
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