一测多评法测定蜂胶类保健食品中咖啡酸等4种成分的含量
Determination of Caffeic Acid and Other Three Components in Propolis Health Foods by Quantitative Analysis of Multi-Components by Single-Maker
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摘要: 目的:建立以蜂胶为单一原料的保健食品中咖啡酸、阿魏酸、异阿魏酸及咖啡酸苯乙酯的"一测多评"含量测定方法。方法:采用高效液相色谱法,以甲醇-0.1%磷酸水溶液为流动相,梯度洗脱,以异阿魏酸为参照物,建立其与咖啡酸、阿魏酸,咖啡酸苯乙酯的相对校正因子,利用相对校正因子计算4种成分的含量,实现一测多评;并对多批样品同时采用一测多评法和标准曲线法测定,将结果进行比较,验证方法的可行性。结果:4种成分在相应的线性范围内线性关系良好,相关系数r>0.9999,平均加标回收率在99.85%~101.69%,RSD在1.7%~2.3%,咖啡酸、阿魏酸、咖啡酸苯乙酯的相对校正因子分别为0.9503、0.9276、1.3902,且在不同实验条件下重现性良好,一测多评法计算值与标准曲线法实测值相对平均偏差在0.1%~1.7%之间,测定结果基本一致。结论:本文建立的一测多评方法操作简便,重复性好,可为以蜂胶为单一原料的保健食品的质量评价提供参考。Abstract: Objective:To establish a quantitative analysis of multi-components by single-maker (QAMS) method for the determination of caffeic acid, erulic acid, isoferulic acid and caffeic acid phenylethyl ester in health food with propolis as a single raw material. Methods:HPLC was used with methanol-0.1% phosphoric acid aqueous solution as mobile phase, gradient elution and isoferulic acid as reference substance to establish its relative correction factors with caffeic acid, ferulic acid and caffeic acid phenylethyl ester. Relative correction factor was used to calculate the content of four components and the method of"QAMS"realized. The method of "QAMS" and standard curve were used to compare the results and verify the feasibility of the method. Results:Within a certain linear range, 4 components had good linear relationships, r>0.9999.The average recovery rates were in the rage of 99.85%~101.69%, and the relative standard deviations (RSDs) were in the range of 1.7%~2.3%. The relative correction factors (RCFs) with caffeic acid, erulic acid and caffeic acid phenylethyl ester with reference to isoferulic acid were 0.9503, 0.9276, 1.3902, respectively. The relative correction factors of each component had good reproducibility under different experimental conditions. There was almost no difference between the calculated values of "QAMS" method and the measured values of standard curve method, and the relative average deviations were in the range of 0.1%~1.7%.Conclusion:The method of "QAMS" was simple and reproducible, and could provide reference for the quality evaluation of health food with propolis as a single raw material.