【摘要】 采用超声辅助乙醇提取罗布麻叶多酚，经紫外光谱与FT-IR鉴定色素主要成分为黄酮类物质；探究了酸碱度、温度、光照、氧化剂（H₂O₂）与还原剂（Na₂S₂O₄）对色素稳定性的影响。结果表明：色素在酸性至中性环境、80℃以下及短时间光照时保持稳定，并对H₂O₂表现出良好耐受性；然而在强碱、高温（>80℃）、长时间光照（>1 d）及还原剂存在的条件下，稳定性显著降低。更多还原

【Abstract】 Polyphenols extracted from Apocynum venetum L. leaves using ultrasound-assisted ethanol are identified as flavonoids via UV spectro meter and FT-IR. The pigment′s stability is evaluated under various conditions（pH, temperature, light, oxidants and reductants）. The results show that the pigment remains stably in acidic to neutral conditions, at temperatures below 80 ℃ and under short-term light exposure, and exhibits good tolerance to H₂O₂. However, its stability significantly decreases under strong alkaline conditions, at high temperatures（>80 ℃）, under long-term light exposure（>1 d）, and in the presence of reductants.更多还原