摘要
采用微波辅助法从向日葵盘中提取果胶,并用响应面分析法优化了提取参数(提取液pH、提取温度、固液比和微波功率)对果胶提取率的影响。从功效、能量节约和实验可行性角度考虑,获得向日葵盘提取果胶的最佳条件是:pH值3.4,提取时间6.8 min,提取液料比为1∶20,微波功率464 W。提取液经浓缩后采用95%乙醇沉淀,所得果胶酯化度为35.42%,半乳糖醛酸含量为87.3%,而灰分仅为4.75%。
Pectin was extracted from the dried sunflower head by microwave-assisted extraction （MAE）. Response surface methodology （RSM） was applied to optimize the effect of processing parameters （pH, extraction time, liquid-solid ratio and microwave power） on the extraction yield of pectin. Considered the extraction efficiency, the energy economization and the experiment feasibility, the optimum extraction conditions of pectin were- pH 3.4, extraction time 6.8 min, solid ： liquid = 1 ： 20, microwave power 464 W. After precipitated by 95 96 ethanol, the quality of pectin was determined as follows： the degree of esterification 35.42 96, D-galacturonic acid content 87.3 %, ash content 4.75 %,
出处
《化工技术与开发》
CAS
2008年第6期33-35,38,共4页
Technology & Development of Chemical Industry
关键词
微波辅助法
果胶提取
向日葵盘
响应面法
mlcrowave-assisted extraction （MAE）
pectin extraction
sunflower head
response surface methodology （ RSM ）
