高效液相色谱法测定化妆品中类视黄醇含量

Determination of Retinoids in Cosmetics by High Performance Liquid Chromatography

  • 摘要: 建立了高效液相色谱法测定化妆品中视黄醇、视黄醛、视黄醇乙酸酯、视黄醇丙酸酯、视黄醇视黄酸酯、视黄醇棕榈酸酯6种化合物含量的方法. 样品经水-四氢呋喃(体积比2∶8)溶液提取,采用Agilent Extend-C18 (4.6 mm×250 mm,5 μm)色谱柱分离,四氢呋喃-0.5%乙酸水溶液作为流动相梯度洗脱,在328、350、382 nm波长下采用二极管阵列检测器检测化妆品中6种类视黄醇含量. 该方法在0.5~10.0 mg/L范围内线性关系良好,相关系数R2不低于0.999 93,6种类视黄醇的检出限在0.5~0.7 mg/kg之间,定量限在1.5~2.1 mg/kg之间. 在水剂型、乳液型、膏霜型3种不同化妆品空白基质中做3个水平加标回收试验,回收率在91.3%~107.7%之间,相对标准偏差(RSD)在0.9%~4.7%之间. 该方法具有简便、快速、高效、准确等优点,适用于化妆品中类视黄醇的测定.

     

    Abstract: A method for the determination of 6 components (retinol, retinal, retinyl acetate, retinyl propionate, retinyl retinoate, retinol palmitate) in cosmetics by high performance liquid chromatography was established. The samples were extracted by water-tetrahydrofuran (volume ratio was 2∶8) solution, separated with a chromatographic column of Agilent Extend-C18 (4.6 mm×250 mm, 5 μm), the mobile phase was tetrahydrofuran-0.5% acetic acid solution with gradient elution, and the diode array detecter (DAD) was used to detect the 6 retinoids in cosmetics with the wavelength of 328, 350 and 382 nm. The method exhibited good linear relationship in the range of 0.5~10.0 mg/L with the correlation coefficient R2 not less than 0.999 93. The limits of detection for the 6 retinoids were in the range of 0.5~0.7 mg/kg, the limits of quantification were in the range of 1.5~2.1 mg/kg. The three-level spiked recovery tests were carried out in three different cosmetic blank matrices of aqueous, emulsion and cream types, and the recoveries ranged from 91.3% to 107.7%, the relative standard deviation (RSD) were 0.9%~4.7%. The method has the advantages such as simple, rapid, high efficiency, high accuracy, which is suitable for determination of retinoids in cosmetics.

     

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