【摘要】 以三华李果渣为原料,对果渣色素的提取和稳定性进行系统研究。通过正交试验,确定果渣色素提取的最佳工艺条件为:含0.8%HCl的55%乙醇溶液、提取温度40℃、浸提时间70min、料液比1∶7(m∶v)。三华李果渣色素最大吸收波长为520nm,耐热性好,耐光性较差,在酸性条件下,在还原剂和蔗糖、柠檬酸中稳定性较好;在氧化剂、苯甲酸钠和山梨酸钾中稳定性较差;该色素对大部分金属离子稳定性较高,其中Fe3+、A13+对色素有增色效果,Cu2+使色素溶液变色,K+、Ca2+、Na+、Mg2+和Zn2+对色素无不良影响。更多还原

【Abstract】 The extraction and stability of pomace pigment from Prunus salicina Lindl.cv.‘sanhua’was investigated. The optimal extraction conditions for Prunus s. pomace pigment by orthogonal assay were as following: using 55% ethanol in water with 0.8%HCl, material/solvent ratio 1∶7, extracting 70 minutes at 40 ℃. The maximum absorption wavelength of pomace pigment was 520 nm. This pigment is resistant to heat, acid reducing agent and common ingredients such as sugar and citric acid, however, it was unstable to light, oxidant, and preservatives such as benzoate and potassium sorbate. Some metal ions such as Fe3+, Al3+ both show color enhancement effect on it, and K+, Ca2+, Na+, Mg2+, and Zn2+ have no undesirable effect on its stability, however, Cu2+ could change its color.更多还原