METHOD OF EXTRACTING ORGANIC SUBSTANCES USING HIGH-SPEED COUNTERCURRENT CHROMATOGRAPH DEVICE

摘要

To provide a method of easily extracting chlorothalonil or the like of agrochemicals remaining in food with a high recovery rate without having to use a solid-phase cartridge filled with graphite carbon.SOLUTION: A method is provided for extracting chlorothalonil contained in acetonitrile extract for pretreatment of residual agrochemicals in food using a high-speed countercurrent chromatograph device 1, the method involving use of one solution of a two-layer solvent introduced from a solvent container 12 as a stationary phase and the other solution as a mobile phase to extract chlorothalonil from a sample liquid 8.SELECTED DRAWING: Figure 1