柚皮中水不溶性膳食纤维的提取及脱色研究

Extraction and Decoloration of Insoluble Dietary Fiber from Shaddock Peel

研究了从柚皮提取完果胶的残渣中提取水不溶性膳食纤维(IDF)的工艺,同时对IDF的脱色工艺也进行了研究。实验表明,从提取完果胶的柚皮残渣中提取IDF的适宜条件为:提取剂为5%的氢氧化钠溶液,物料比10,在室温下浸泡4 h左右,然后进行脱色处理;适宜脱色剂为5%的脱色剂A溶液,在75℃的环境中,用醋酸调节pH值至4.8左右,用2.5倍体积的脱色剂A进行脱色1 h。所得产品颜色浅,质量较好,IDF的得率为46%左右。

The extraction and decoloration technology of water insoluble dietary fiber from residue of shaddock peel after the extraction of pectin were studied. Experimental results showed that the proper extracting and decoloring conditions were as follow： extracting agent was 5% NaOH solution, material ratio was 10 and extraction duration was 4h. Then, the crude IDF was treated by 2.5 times of volume of decoloring agent A solution at 75 ℃, pH 4.8 （adjust by HAc） for 1 h. The yield of IDF would be 46% or so with light color and good quality.