冷皂化-HPLC测定强化食品中的维生素A、E的方法研究
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赵海燕 女 工程师 研究方向为食品污染物检测及保健食品功效成分 E-mail zhaohy-yan@hotmail.com

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Determination of Vitamin A and E in Fortified Foods by Cold Saponification-HPLC Method
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    摘要:

    目的 建立测定强化食品中的维生素A、E的冷皂化-HPLC方法。方法 试样经过夜冷皂化后,醋酸调pH值至6.0~7.5,定容离心后高效液相色谱法测定;色谱条件:色谱柱SUPERIOREX ODS ( 4.6 mm×250 mm,5μm),流动相:甲醇+水=94+6。结果 方法的线性范围:维生素A:0.25~3.00μg/ml;维生素γ-E、δ-E、α-E:10.0~150μg/ml。相关系数R为0.9997~0.9999;方法的定性检出限维生素A、γ-E、δ-E、α-E分别为:0.40、5.0、5.0、8.0μg/g;定量检出限:1.30、16.7、16.7、26.7μg/g。高低两个浓度水平加标回收率:77%~105%;相对标准偏差均<5%。结论 本方法简便、快速、准确、重现性好,适用于强化食品中维生素A、E的测定。

    Abstract:

    Objective To establish a cold saponification-HPLC method for the determination of vitamin A and vitamin E in fortified foods. Method Samples were saponified over night, adjusted to pH 6.0?7.5 with acetic acid and determined by HPLC. Chromatographic conditions: using SUPERIOREX ODS Column (4.6 mm×250 mm, 5μm) with a mobile phase of methanol and water (94?6). Results The linearity ranges were 0.25?3.00μg/ml for vitamin A and 10.0-150.0μg/ml for Vitamin γ-E, δ-E and α-E. The correlation coefficients were 0.9997?0.9999. The qualitative detection limit was 0.40μg/g for vitamin A, 5.0μg/g for vitamin γ-E and δ-E and 8.0μg/g for vitamin α-E. The quantitative detection limits of the method were 1.30μg/g for vitamin A, 16.7μg/g for vitamin γ-E and δ-E, and 26.7μg/g for vitamin α-E. The average recoveries of adding standards were 77.0%?105% and the relative standard deviation (RSD) of the method was less than 5%. Conclusion: The method was simple, fast, accurate and reproducible and could be used to determine the contents of Vitamin A and vitamin E in vitamin fortified foods.

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赵海燕,赵 榕,杨永红,罗仁才.冷皂化-HPLC测定强化食品中的维生素A、E的方法研究[J].中国食品卫生杂志,2010,22(4):344-346.

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  • 收稿日期:2009-05-23
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