关键词: 胭脂萝卜, 水杨酸天竺葵素, 酰化, 抗氧化活性

Abstract: To explore the stability and antioxidant activity of carmine radish pelargonidin which acylated by salicylic acid,retention rate taken as the index,a series of element have taken to analyzed such as light,temperature,metal ions,pH and H₂O₂.To demonstrate the scavenging ability of acylated pelargonidin,hydroxyl,DPPH and ABTS radicals had been detected.The results showed that the stability of acylated pelargonium was significantly improved in light,temperature,Al³⁺ and pH,but remaimed no significant difference in Fe²⁺,Mg²⁺,Zn²⁺  and H₂O₂.The scavenging capacity of acylated pelargonium on hydroxyl,DPPH and ABTS free radicals was no significantly different from that of normal pelargonium.These results indicated that acylation had no impact on the antioxidant activity of pelargonium,but also improved its stability to light temperature,Al³⁺ and pH.

Key words: carmine radish, pelargonidin, acylation, antioxidant activity