【摘要】 采用固相分散萃取-高效液相色谱法同时测定番茄酱中的α-萘乙酸和对氯苯氧乙酸两种植物生长调节剂。固相分散萃取过程中以无水硫酸钠为分散剂。色谱条件:C18色谱柱,甲醇-水(体积比50∶50)为流动相,流速:1.0 mL/min,检测波长230 nm。在0.005～5.0 mg/L范围内线性关系良好,相关系数大于0.999。两组分方法检出限均为0.02μg/g,平均回收率为87.0%和71.0%,相对标准偏差为1.7%和1.5%。更多还原

【Abstract】 In this paper a novel method was established for the separation and determination of α-naphthylacetic acid and p-chlorophenoxyacetic acid in ketchup by solid-phase dispersive extraction with high performance liquid chromatography.The anhydrous sodium sulfate was the dispersing agent in the process of solid-phase dispersive extraction.The components were separated by C18 column in the wavelength at 230 nm.The mobile phase was methanol and water(50∶50) with flow rate of 1.0 mL/min.The detection limit of α-naphthylacetic acid and p-chlorophenoxyacetic acid were 0.02 μg/g,the calibration curve were linear between 0.005 and 5.0 mg/mL,the correlation coefficient were greater than 0.999,relative standard deviations were 1.7% and 1.5%,recoveries were 87.0% and 71.0%,respectively.更多还原