超高效液相色谱-串联质谱法测定红薯叶中15种功效成分

建立了超高效液相色谱-串联质谱（UHPLC-MS/MS）快速测定红薯叶中15种功效成分的分析方法。样品用80%（v/v）甲醇水溶液提取后，采用C₁₈色谱柱（100 mm×2.1 mm，1.8 μm）进行分离，以乙腈-0.15%（v/v）甲酸水溶液为流动相进行梯度洗脱，在电喷雾电离（ESI）源、负离子扫描模式下，通过多反应监测（MRM）模式检测各物质分子的离子峰。在各自的范围内15种功效成分线性关系良好，相关系数（r）为0.9995~0.9998；在3个加标水平下，15种化合物的回收率为82.2%~131.4%，相对标准偏差为3.6%~8.3%；方法的检出限为0.13~0.64 μg/L。该方法前处理简单，灵敏度高，适用于红薯叶中功效组分的快速分析，定量分析结果显示咖啡奎宁酸类物质是红薯叶中的主要功效成分。

Determination of 15 functional components in sweet potato leaves by ultra high performance liquid chromatography-tandem mass spectrometry

A method for the rapid determination of 15 functional components in sweet potato leaves by ultra high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) was established. The samples were extracted with 80% (v/v) methanol aqueous solution, and then separated on a C₁₈ column (100 mm×2.1 mm, 1.8 μm) with gradient elution. The mobile phases were acetonitrile and 0.15% (v/v) formic acid aqueous solution. The multiple reaction monitoring (MRM) mode was used to detect the molecular ion peak of each component in electrospray ionization (ESI) source and negative ion scan mode. The results showed that the good linear relationships for the 15 components were obtained with correlation coefficients (r) ranging from 0.9995 to 0.9998. The recoveries of all the components ranged from 82.2% to 131.4% with relative standard deviations of 3.6%-8.3%. The method is simple, sensitive, and is suitable for the rapid analysis of the functional components in sweet potato leaves.