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为探讨理化因子对风信子花色苷稳定性的影响,采用体外试验,以风信子‘Woodstock’花瓣为材料,研究了温度、光照、pH和金属离子等各因素对风信子花瓣中花色苷呈色及光谱特征变化规律的影响。结果表明:风信子‘Woodstock’花色苷不耐高温和强光,温度升高及延长加热时间均使花色苷降解褪色,且随着pH增大,花色苷最大吸收波长朝长波方向移动;Fe~(3+)、Fe~(2+)、Al~(3+)和Cu~(2+)均使花色苷变色,但Mg~(2+)对其无明显影响,Ca~(2+)和Zn~(2+)则在高浓度时有增色效应,Pb~(2+)会破坏花色苷的稳定性而产生白色沉淀。除了Fe~(2+)和Pb~(2+)产生蓝移外,其他金属离子都使花色苷发生不同程度的红移。
In order to explore the effect of physical and chemical factors on the stability of the anthocyanins of hyacinth, we studied the effects of temperature, light, pH and metal ions on the anthocyanins in hyacinth petals And the change of spectral characteristics. The results showed that the highest absorption wavelength of anthocyanins shifted toward longwave when the temperature increased and the heating time prolonged the decay of anthocyanins. (3 +), Fe ~ (2 +), Al ~ (3+) and Cu ~ (2+) all changed the color of anthocyanins, but Mg ~ (2+) had no obvious effect on Ca ~ (2+) And Zn ~ (2+) have the effect of increasing color at high concentration, Pb ~ (2+) will destroy the stability of anthocyanins and produce white precipitate. Except for the blue shift of Fe 2+ and Pb 2+, other metal ions caused anthocyanin red-shift to some extent.