摘要
以花色苷提取率为考察指标,采用亚临界水提取新鲜紫薯中天然色素花色苷。通过单因素实验和正交实验确定最优提取条件为:提取温度115℃、提取时间13min、液料比8∶1(mL∶g)、pH值3.0,在此条件下,新鲜紫薯中花色苷的提取率最高可以达到0.139mg·g-1,与水提法相比,提取时间缩短了近5倍,产品色价提高了6.2%。
Using extraction rate of anthocyanins as index,the natural pigment anthocyanins in fresh purple sweet potato was extracted by sub-critical water extraction method.Through the single factor experiment and the orthogonal experiment,the optimum extraction conditions were obtained as follows：extraction temperature of 115 ℃,extraction time of 13 min,liquid-material ratio of 8∶1（mL∶g）,pH value of 3.0.Under above conditions,the extraction rate reached 0.139 mg·g^-1.Compared with water extraction method,the color value of anthocyanins extracted by sub-critical water extraction method increased by 6.2%,and the extraction time shorten by nearly five-fold.
出处
《化学与生物工程》
CAS
2014年第12期44-47,共4页
Chemistry & Bioengineering
关键词
新鲜紫薯
亚临界水提取
花色苷
色价
fresh purple sweet potato
sub-critical water extraction
anthocyanins
color value
