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采用正交试验L16 (44 × 2 3)方法优选了提取女贞子 (LigustrumlucidumAit)果皮红色素的方法 ,并对提取工艺条件进行了初步探索。实验结果表明 ,女贞子果皮色素宜用碱液法浸提 ,碱液浸提法的最佳工艺条件是 :碱液宜用氨 氯化铵缓冲溶液或氨水溶液 ;控制溶液 pH为 12～ 13 ;物料比为 :干原料∶浸提液 =1∶7～ 10 (w/w)或新鲜原料∶浸提液 =1∶4～ 6(w/w) ;浸提温度为 65～ 68℃ ;浸提时间为 :微波辐照下 5～ 10min ,无微波下 60min以上 ;浸提次数为 2～ 3次。色素粉的产率可达 10 8%以上 (干料 ) ,6 8%以上 (鲜料 ) ,色素的提取率为 70 2 %～ 79 1%。色素经对热、光、盐的稳定性实验和溶解性等理化性质的测定 ,结果表明色素具有良好的稳定性 ,色素粉的质量达到了国内同类产品企业标准的要求
The method of extracting Ligustrum lucidumAit peel red pigment by orthogonal test L16 (44 × 2 3) was optimized, and the extraction process conditions were preliminarily explored. The results showed that the pigment of Ligustrum lucidum pericarp should be extracted by lye method. The optimum conditions of lye leaching were as follows: the lye should be treated with ammonium chloride buffer solution or ammonia solution; the pH of the solution should be 12-13 ; The material ratio is: dry raw material: leaching liquor = 1: 7-10 (w / w) or fresh raw material: leaching liquor = 1: 4-6 w / w; extraction temperature is 65-68 ℃; Extraction time: 5 ~ 10min under microwave irradiation, no more than 60min under microwave; extraction times of 2 to 3 times. Pigment powder yield up to more than 10 8% (dry material), more than 68% (fresh material), pigment extraction rate of 70 2% ~ 79 1%. The results of the physical and chemical properties of the pigment, such as heat, light and salt stability experiments and solubility tests, showed that the pigment has good stability and the quality of the pigment powder has reached the requirements of the enterprise standard of similar products in China