目的：研究从中草药红纹马先蒿提取的ＰＰＧ的抗氧化和络合作用．方法：用ＦｅＳＯ４依他酸引发亚油酸过氧化，用硫代巴比妥酸法测过氧化产物．用差示光谱法测对Ｆｅ２＋的络合作用．结果：对照组脂类过氧化速率（Ａ５３２·ｍｉｎ－１）为０００４６，毛蕊花苷组为０００２１，异毛蕊花苷组为００００８．异毛蕊花苷络合Ｆｅ２＋的能力２倍于毛蕊花苷．多甲基毛蕊花苷既无抗氧化力（氧化速率０００４１）也无络合作用．结论：具有酚羟基的ＰＰＧ的抗氧化作用正是通过它们的络合特性起作用的．在生理条件下，ＰＰＧＦｅ２＋络合很稳定，因此ＰＰＧ在整体中也能像离体时那样抑制Ｆｅ２＋催化的脂类过氧化． 4. Objective : To study the antioxidation and complexation of PPG extracted from Chinese herbal medicine, Prof. Methods: Peroxidation of linoleic acid was induced by FeSO4isobutyric acid, and oxidation products were measured by thiobarbituric acid method. The complexation of Fe2+ was measured by differential spectroscopy. RESULTS: Lipid peroxidation rate (A532 min-1) was 00046 in the control group, 00021 in the verbascoside group, and 00008 in the isberangin group. Iverarten is 2 times more potent than verbascoside in complexing Fe2+. Polymethyl verbascoside has neither antioxidant activity (oxidation rate 00041) nor complexation. Conclusion: The antioxidation of PPG with phenolic hydroxyl groups acts through their complexing properties. Under physiological conditions, PPG-Fe2+ complexation is very stable, so PPG can also inhibit Fe2+-catalyzed lipid peroxidation as it did in vitro.