Herein, we carried out the extraction of polyphenol resveratrol and its glycoside (piceid) from raw Japanese knotweed via a simple method, employing dimethyl ether (DME) as the solvent. With DME extraction, the conventional drying and cell wall disruption steps can be left out. As a result, more resveratrol and piceid were obtained in DME extraction than in conventional ethanol extraction. Because the Hansen solubility parameters of DME are closer to ethanol than to water, it allowed us to extract resveratrol and piceid from raw Japanese knotweed, unlike water. Simultaneously, 83.5% of the initial water and 213 mg/g dry of organic extracts were extracted from raw Japanese knotweed. As DME extraction does not involve drying and grinding of the decomposed antioxidants, it is highly suitable for extracting antioxidants.

中文翻译：

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不用预处理就可通过液化二甲醚从虎杖根茎中无乙醇提取白藜芦醇及其糖苷

在这里，我们采用一种简单的方法，以二甲醚（DME）为溶剂，从粗制虎杖中提取了多酚白藜芦醇及其糖苷（甜菜碱）。通过DME提取，可以省去常规的干燥和细胞壁破坏步骤。结果，与常规乙醇提取相比，DME提取获得了更多的白藜芦醇和扑热息痛。由于DME的Hansen溶解度参数比乙醇更接近于乙醇，因此与水相比，它使我们能够从原始虎杖中提取白藜芦醇和木虱。同时，从原始虎杖中提取了83.5％的初始水和213 mg / g干的有机提取物。由于DME提取不涉及分解的抗氧化剂的干燥和研磨，因此非常适合提取抗氧化剂。