摘要
以广西武鸣双桥镇产的新鲜沃柑为原料,采用酸法提取沃柑果皮中的果胶,并以沃柑果胶得率为评价指标,通过单因素及响应面试验法优化沃柑果胶的提取条件,并分析提取的果胶的理化性质.结果表明,果胶最佳提取工艺参数为:提取液料比50∶1(mL∶g)、提取pH 1.3、提取温度89℃、提取时间97 min,此条件下的果胶得率为21.36％.果胶的水分含量为10.5％、酸不溶灰分含量为0.48％、半乳糖醛酸含量为72.6％、酯化度为89.9％,均符合果胶国标要求,表明该酸法可用于提取沃柑皮中的果胶.
Abstract
Using the fresh Orah from Shuangqiao town,Wuming,Guangxi as raw material,the pectin was extracted by acid method,and taking the yield of pectin from Orah as evaluation index,the extraction conditions of Orah pectin were optimized by single factor and response surface method.The results showed that the optimal extraction parameters were as follows:liquid-solid ratio 50∶1(ml∶g),extraction pH 1.3,temperature 89 ℃,and time 97 min.Under the conditions,the yield of pectin was 21.36％.The water content of pectin was 10.5％,the acid-insoluble ash content was 0.48％,the galacturonic acid content was 72.6％,and the esterification degree was 89.9％,meeting the national standards for pectin.The results showed that the acid method could be used to extract pectin from Orah peel.
维普
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