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1. (WO2018043465) METHOD FOR PREPARING SAMPLE FOR ANALYZING RESIDUAL AGRICULTURAL CHEMICAL

Pub. No.:    WO/2018/043465    International Application No.:    PCT/JP2017/030870
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Wed Aug 30 01:59:59 CEST 2017
IPC: G01N 30/04
G01N 27/62
G01N 30/72
G01N 30/88
G01N 33/02
G01N 1/10
Applicants: MIURA CO., LTD.
三浦工業株式会社
Inventors: KAWASHIMA, Ayato
川嶋 文人
OKAMOTO, Minami
岡本 みなみ
HAMADA, Noriaki
▲浜▼田 典明
Title: METHOD FOR PREPARING SAMPLE FOR ANALYZING RESIDUAL AGRICULTURAL CHEMICAL
Abstract:
A residual agricultural chemical is extracted from a food using a water-soluble solvent and the obtained extract is mixed with water to give a liquid mixture. In a centrifuge tube (A) the inside of which is partitioned into upper and lower parts by an adsorbent layer (110) capable of adsorbing the residual agricultural chemical, a separation membrane (130) having a pore size with a molecular weight cutoff of 10,000 or greater is disposed above the adsorbent layer (110) to form a first treatment layer. Then, the liquid mixture is poured onto the separation membrane (130) and a centrifugal force is applied to the centrifuge tube (A) so that the liquid mixture is passed through the separation membrane (130) and the adsorbent layer (110). In another centrifuge tube (B) the inside of which is partitioned into upper and lower parts by a second treatment layer (210) comprising a dehydration layer (211) and a purification layer (212), the adsorbent layer (110), through which the liquid mixture has passed, is disposed above the second treatment layer (210). Next, an extraction solvent is poured onto the adsorbent layer (110) and a centrifugal force is applied to the centrifuge tube (B). Then, the extraction solvent having passed through the second treatment layer (210) is employed as a sample for analyzing the residual solution.