摘要:
With chlorophyll from sisal residue as raw material,the effects of acidification,copper and saponification conditions on the yield of sodium copper chlorophyllin were studied.The results show that pH=3,temperature is 65 °C,acidification time is 60 min;The amount of copper sulfate was 1.5 g,and the time was 2 h;The saponification temperature is 75 °C,time is 60 min,pH=12,the product yield is 4.46%.UV-VIS,IR showed that the product was sodium copper chlorophyllin,this product has good heat resistance(<100 °C),stable under neutral and alkaline conditions,poor light fastness,the reductant is stable,and the stability is poor,it can be mixed with other food additives(common).This study lays a foundation for resource utilization of sisal residue.%以从剑麻膏中萃取得到的叶绿素为原料,研究了酸化、铜代、皂化条件对叶绿素铜钠盐产率的影响.结果表明,酸化时pH=3,温度65 °C,酸化时间60 min;铜代时硫酸铜加量1.5 g,时间2 h;皂化时温度75 °C,时间60 min,pH=12,产品的产率为4.46%.UV-VIS、IR表明,所得产品为叶绿素铜钠盐,该产品耐热性(<100 °C时)良好,在中性和偏碱性条件下稳定,耐光性较差,对还原剂较稳定,对氧化剂稳定性差,可与其它(常见的)食品添加剂混合使用.