化妆品中维生素D2、维生素D3的高效液相色谱测定

目的建立化妆品中维生素D2、维生素D3的高效液相色谱检测方法,用于监测化妆品中维生素D2、维生素D3的使用情况.方法通过考察不同型号液相色谱柱、不同类型流动相及配比,确定了最佳色谱条件,并进行了线性范围、检出限、精密度、准确度试验.结果在Alltima C18(250mm×4.6mm I.D.,5μμm)色谱柱;流动相为甲醇乙腈=9010;流速为1.0 ml/min;检测波长为265nm;柱温为25℃时,维生素D2、维生素D3在0.5～100mg/L浓度范围内具有良好的线性关系,检出限分别为0.12mg/L和0.06mg/L;不同浓度维生素D2、维生素D3的变异系数分别小于3.8%和3.5%;加标量为20μg/g时,维生素D2、维生素D3的加标回收率分别在94.2%～101.4%和91.6%～97.2%之间.结论该方法具有操作简便、准确、快速等特点,适于同时测定化妆品中的维生素d2、维生素D3.

Determination of vitamins D2, vitamin D3 in cosmetics by high performance liquid chromatography

OBJECTIVE: A high performance liquid chromatography method was used to detect vitamins D2 and vitamin D3, which is useful to know the use of vitamins D2 and vitamin D3 in cosmetics, prohibit the influx of cosmetics containing vitamins D2 and vitamin D3 to cosmetic market, safeguard the health of consumers. METHODS: A high performance liquid chromatography method was established for determination of vitamins D2 and vitamin D3 in cosmetics. The separation condition was optimized by trying different type of columns and mobile phases. RESULTS: The experiment goes on a Alltima C18 column (250 mm x 4.6 mm I. D., 5 microm)using methanol-acetonitrile (90: 10) as mobile phase at a flow rate of 1.0 ml/min, with the column temperature 25 degrees C and detection wave 265nm. The liner range is from 0.5 mg/L to 100 mg/L with good relationship. The detection limit of vitamin D2 is 0. 12 mg/L, the precision is less than 3.8% and recovery varies from 94.2% to 101.4%, while the detection limit of vitamin D3 is 0.06 mg/L, the precision is less than 3.5% and recovery varies from 91.6% to 97.2%. CONCLUSION: The method is simple, precise and accurate, which is suitable for the determination of vitamins D2 and vitamin D3 in cosmetics.