Study on Preparation Process Optimization and Characteristics of Fructose Common Caramel Pigment
In order to explore the preparation process and product characteristics of fructose common caramel pigment,the effects of reaction temperature,reaction time and pH value of fructose-base on the fructose common caramel color index were investigated.The preparation process of fructose common caramel pigment was optimized by response surface test design,and the acid and alkali resistance and salt resistance characteristics of caramel pigment were also investigated.The results showed that the optimized process of fructose common caramel were as follows:reaction temperature 154℃,reaction time 62 min,fructose base pH value 2.96,and the color index of caramel was 17 894 EBC under these conditions.The acid and alkali resistance and salt resistance characteristics of caramel pigment showed that the color index of caramel decreased slightly when the pigment was between pH value 4 and 8.Fructose common caramel was stable in the anhydrous sodium sulfite solution and sodium chloride solution,and the caramel color index increased slightly in the sodium dihydrogen phosphate and sodium citrate solution.The color index of fructose common caramel did not decrease at the presence of salt.This study provides a theoretical basis for the further development and utilization of fructose common caramel.
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