SAMPLING METHOD AND SAMPLING DEVICE, AND logD MEASURING METHOD AND logD MEASURING SYSTEM

摘要

A sampling method capable of easily sampling the lower layer of a liquid divided into two types without causing mixing and a sampling device, and a logD measuring method and a logD measuring system. The lower layer liquid (50b) is sampled from the liquid divided into two layers of an upper layer liquid (octanol) (50a) and the lower layer liquid (buffer liquid) (50b) by using an extraction means (11) having a tubular tip part (11a) and extracting the liquid from the tip part (11a) by inserting the tip part (11a) from the upper side into the liquid. The method comprises a plug filling step for filling a plug liquid (51) not mixed with the upper layer liquid (50a) to the tip part (11a) of the extraction means (11) and an extraction step for extracting the lower layer liquid (50b) by the extraction means (11) in which the plug liquid (51) is filled in the plug filling step.