卫生研究

目的 建立可同时检测水果中类黄酮(表儿茶素、异荭草苷、圣草次苷、金丝桃苷、芸香柚皮苷、柚皮苷、橙皮苷、新橙皮苷、槲皮素、香蜂草苷、柚皮素和橙皮素)、酚酸(没食子酸、绿原酸、咖啡酸、阿魏酸、芥子酸和对香豆酸)、萜类物质(柠檬苦素)和芪类物质(白皮杉醇、白藜芦醇)等多酚物质的高效液相色谱法。方法 水果果肉样品中加入乙醇-水(4∶1,V/V)溶液，55℃下超声提取10 min,离心，取上清液减压干燥复溶后，以ZORBAX Eclipse XDB-C₁₈(4.6 mm×100 mm, 3.5μm)为色谱柱，通过高效液相色谱在切换波长下对多酚物质进行测定，外标法定量。结果 21种多酚物质在45 min内可被检出并基线良好分离，线性相关系数(R²)均大于0.999。方法的检出限为0.03～0.31μg/g,定量限为0.09～1.03μg/g。3种水果日内精密度为0.5%～9.3%,日间精密度为2.0%～9.6%。3种水果90%以上多酚物质三水平加标回收率在80.0%～119.8%之间，加标回收率精密度<10.8%。对柑橘、芒果、蓝莓、柿子等样品的检测结果证明了不同水果的多酚物质组成有差异。结论 方法灵敏，精密度、重现性良好，适用于多种水果中多酚物质的含量测定。

OBJECTIVE To establish a high performance liquid chromatography(HPLC) method for simultaneous determination of flavonoids(epicatechin, isoorientin, eriocitrin, hyperoside, narirutin, naringin, hesperidin, neohesperidin, quercetin, didymin, naringenin and hesperetin), phenolic acids(gallic acid, chlorogenic acid, caffeic acid, ferulic acid, sinapic acid and p-coumaric acid), terpenoids(limonin), stilbenes(piceatannol and resveratrol) in fruits.METHODSAdd ethanol-water(4∶1, V/V) solution to the fruit pulp sample, ultrasonic extraction at 55 ℃ for 10 min, after centrifugation, the supernatant was dried and re-dissolved, and then eluted with ZORBAX Eclipse XDB-C₁₈(4.6 mm×100 mm, 3.5 μm) as chromatographic column, polyphenols are determined by HPLC under switching wavelength, and quantified by external standard method.RESULTS The 21 polyphenols can be detected within 45 min and well separated from baseline, with linear correlation coefficients greater than 0.999, the detection limit of the method was 0.03-0.31 μg/g, and the limit of quantitation of the method was 0.09-1.03 μg/g. The intra-day precision was 0.5%-9.3%, the inter-day precision was 2.0%-9.6%. The recoveries of more than 90% polyphenols in the three fruits at three levels were between 80.0% and 119.8%. The relative standard deviation of spiked recoveries of three samples was less than 10.8%. The detection result of citrus, mango, blueberry, persimmon and other samples proved that the composition of polyphenols in different fruits was different.CONCLUSION The method is sensitive, accurate and reproducible, and is suitable for the determination of polyphenols in fruits.