The dietary fiber is extracted from rose pomace by enzyme-chemical method,and the insoluble dietary fiber(IDF)in rose pomace is decolorized by using hydrogen peroxide.Single factor test is conducted on the four factors such as hydrogen peroxide concentration,decolorization temperature,pH value and decolorization time,and then response surface test is carried out.The results of response surface test and validation test show that the optimal decolorization conditions for IDF are hydrogen peroxide concentration(mass fraction)of 11％,pH value of 10,decolorization time of 80 min and decolorization temperature of 71 ℃,under such conditions,the color difference value ΔE is 51.37.The color of the product is yellowish green,without any odor,in the form of fine particles.After decolorization,the properties of IDF are improved to a certain extent,the water holding capacity is 6.857 4 g/g,the oil holding capacity is 1.837 9 g/g,and the water swelling capacity is 3.17 mL/g.
关键词
玫瑰花渣/不溶性膳食纤维(IDF)/脱色/双氧水
Key words
rose pomace/insoluble dietary fiber(IDF)/decolorization/hydrogen peroxide
维普
万方数据