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范文编号:SW093 范文字数:10403,页数:24 摘要：建立了高效液相色谱(HPLC) 测定葡萄酒中反式白藜芦醇方法,并用此方法测定了不同方法酿制的葡萄酒中反式白藜芦醇的含量，并测定不同酵母菌种、时间、温度、PH值对酿制葡萄酒中白藜芦醇含量的影响。实验中葡萄酒样品先经过高速离心, 有效地去除了葡萄酒中大量干扰成分。采用Hypersil C18 柱(4.6 mm i.d.×250mm ,5μm) 分离,以乙腈-水为流动相,线性梯度洗脱,用二极管阵列检测器分别于288 nm 和306 nm 波长下检测, 白藜芦醇与其他成分分离良好,提高了分析结果的准确性。采用外标法定量待测组分的质量浓度与其峰面积在一定的范围内有良好的线性关系,相关系数为0.9973～0.9999。检测限为0.002～0.005mg/L。对不同方法酿制的葡萄酒的检测结果表明,白藜芦醇作为葡萄酒中重要的生物活性成分,其含量与葡萄酒的酿造工艺有密切的关系，不同酵母菌种、时间、温度、PH值对酿制的葡萄酒中的白藜芦醇含量产生了影响。该方法还可用于其他天然产物中反式白藜芦醇含量的测定。 ABSTRACT：A method has been developed for the determination of the contents of cis2 and trans-resveratrols and in the wines made by ourselves. by high performance liquid chromatography (HPLC) with fast-divided .The analytes were separated by using a Hypersil C18 column (4.6 mm i. d. ×250 mm , 5μm) and acetonit rile-water as mobile phase with linear gradient elution. A photodiode array detector monitored at the detection wavelen gths of 288 nm and 306 nm for cis-and t r a ns-isomers , respectively. The external standard calibration curves were used in quantitation. There were good linear correlations between the concent rations and peak areas of the four components with the correlation coefficients of 01997 3 - 0. 999 9. The average recoveries were 97.4 %- 98.6 % with relative standard deviations of 2.1 %- 3.2 %. The detection limits were 0.002 – 0.005 mg/ L. The method of HPLC eliminated a great deal of interferences in wines effectively by fast-divided. The effective contents were well separated and the analytical results were improved well and t ruly. The results for determining the wines made by ourselves showed that as an important bioactive substance , the resverat rol content has close relationships with fast-divided methods .The results also showed that it is a convenient , rapid , sensitive and accurate method. It can be used to analyze resverat rols and in other natural samples . 目录
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