2,4-D(2,4一二氯苯氧乙酸)是使用很久的除草剂。现在已推广应用于水果收获前、后的处理,及作为薯类的生长调节剂。它的残留量可用薄层色谱法和气相色谱法测定。由于葡萄不存在2,4-D与蛋白质结合的问题,所以采用了酸性有机溶剂提取,经甲酯化后进行气相色谱分析,保留时间为1分50秒,不见干扰,因而缩短了实验操作的时间。 2,4-D (2,4-Dichlorophenoxyacetic acid) is a long-used herbicide. Now it has been widely applied to the treatment of fruits before and after harvesting, and as a potato growth regulator. Its residual amount can be determined by thin layer chromatography and gas chromatography. As there is no grape and 2,4-D protein binding problems, so the use of acidic organic solvent extraction, methyl esterified by gas chromatography, the retention time of 1 minute 50 seconds, no interference, thus shortening the experimental operation time.