Using reaction time,reaction temperature,initial pH value of solution,and molar ratio of L-ascorbic acid and glycine as factors,and the degradation rate of L-ascorbic acid as an evaluation index,we optimized the degradation process of L-ascorbic acid in the Maillard reaction by response surface methodologies.The optimum degradation conditions can be determined as follows:the reaction time of 146 min,the reaction temperature of 149℃,the initial pH value of solution of 4.52,and the molar ratio of L-ascorbic a...