本文将离子电极与流动注射分析相结合,利用30℃下,在强碱性介质中,果糖和葡萄糖与2,4-二硝基酚钠反应速度明显差异,动力学测定了葡萄糖存在下果糖的含量。自制了2,4-二硝基酚电极作为动力学电位测定用的工作电极。本法测定果糖的范围为0.02～1.00mol/L,其RSD为4.0％～4.9％,RE为1.0～5.0％;当C_葡/C_果≤3倍时,葡萄糖的干扰不超过5％;本法也曾成功地用于果葡糖浆测定,其RSD约为5％。 In this paper, the combination of ionic electrode and flow injection analysis was used. The reaction speed of fructose and glucose with sodium 2,4-dinitrophenol was obviously different in strong alkaline medium at 30 ℃. The kinetics of the reaction of fructose content. A 2,4-dinitrophenol electrode was prepared as a working electrode for kinetic potential measurement. The fructose determined by this method is in the range of 0.02-1.00 mol / L with RSD of 4.0% -4.9% and RE of 1.0-5.0%. When glucose is not more than 5% This method has also been successfully used in the determination of fructose syrup with a RSD of about 5%.