Spinach intake has long been highlighted globally because of its outstanding nutritional aspects. In this study, changes in flavonoids, a representative functional phytochemical group, were investigated by UPLC–QTof MS with multivariate analysis of winter-spinach samples from three different cultivation regions in Korea. From the partial least squares discriminant analysis (PLS-DA), the differences of flavonoids among the geographic locations were clearly distinguished. Seven spinach flavonoids (2, patuletin-3-O-glucosyl-(1 → 6)-glucoside; 4, spinacetin-3-O-glucosyl-(1 → 6)-[apiosyl-(1 → 2)]-glucoside; 8, patuletin 3-O-(2″-feruloylglucosyl)-(1 → 6)-[apiosyl-(1 → 2)]-glucoside; 11, spinacetin 3-O-(2″-feruloylglucosyl)-(1 → 6)-[apiosyl-(1 → 2)]-glucoside; 12, patuletin 3-O-(2′'-feruloylglucosyl)-(1 → 6)-glucoside; 18, 5,3′,4′-trihydroxy−3-methoxy-6:7-methylendioxyflavone-4′-glucuronide; 20, 5,4′-dihydroxy-3,3′-dimethoxy-6:7-methylendioxyflavone-4′-glucuronide) were evaluated as key markers among 20 isolated metabolites. Interestingly, the contents of individual marker were significantly different among the groups, though total amount of flavonoids were almost same. Additionally, policosanols (PCs) in the winter-spinach was examined quantitatively using GC–MS for the first time. The PCs were analyzed as the range of 53.6–59.2 mg/100 g, indicate that the winter-spinach is a beneficial source of PCs.

菠菜的摄入一直以来因其突出的营养方面而在全球范围内受到关注。在这项研究中，通过UPLC-QTof MS对来自韩国三个不同种植地区的冬季菠菜样品进行多变量分析，研究了代表功能性植物化学组的类黄酮的变化。通过偏最小二乘判别分析（PLS-DA），可以清楚地区分地理位置之间的类黄酮差异。七个菠菜类黄酮（2，patuletin-3- O-葡萄糖基-（1→6）-葡萄糖苷; 4，spinacetin-3- O-葡萄糖基-（1→6）-[apiosyl-（1→2）]-葡萄糖苷; 8，patuletin 3- O-（2″-阿魏酰葡糖基）-（1→6）-[apiosyl-（1→2）]-葡糖苷；11，菠菜素3- O-（2″-阿魏酰基葡糖基）-（1→6）-[apiosyl-（1→2）]-葡糖苷；12，patuletin 3- O-（2''-阿魏酰葡糖基）-（1→6）-葡糖苷；图18、5,3'，4'-三羟基-3-甲氧基-6：7-甲基二乙氧基黄酮-4'-葡糖醛酸苷；20在20种分离出的代谢产物中，将5,4'-二羟基-3,3'-二甲氧基-6：7-甲基乙二氧基黄酮4'-葡糖醛酸苷作为关键标志物进行了评估。有趣的是，尽管类黄酮的总量几乎相同，但各组中单个标记物的含量却存在显着差异。此外，首次使用GC-MS对冬季菠菜中的二十二烷醇（PCs）进行了定量检测。对五氯苯酚的分析范围为53.6-59.2 mg / 100 g，表明冬菠菜是五氯苯酚的有益来源。