| 摘要 |
A lower-layer liquid is sampled, without mixing and without difficulties, from a liquid body comprised of two layers of two types of liquids. A sampling method according to the present invention is a sampling method of sampling a lower-layer liquid 50b from a liquid body comprised of two layers of liquids, an upper-layer liquid (octanol) 50a and the lower-layer liquid (buffer solution) 50b, using an extracting device 11 provided with a tubular apical end 11a and adapted to bring the apical end 11a from above into a liquid and to extract the liquid through the apical end 11a, which includes a plug injection step of injecting a plug liquid 51 not mixing with the upper-layer liquid 50a, into the apical end 11a of the extracting device 11, and an extraction step of extracting the lower-layer liquid 50b by means of the extracting device 11 with the plug liquid 51 injected in the plug injection step.
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