US 12,092,618 B2
Extract recovery method and analysis method using polymer beads in a trap when using supercritical extraction
Yuka Fujito, Columbia, MD (US); Risa Ishii, Hitachi (JP); Michio Butsugan, Hitachi (JP); and Keita Sakurai, Hitachi (JP)
Assigned to SHIMADZU CORPORATION, Kyoto (JP)
Appl. No. 17/046,600
Filed by Shimadzu Corporation, Kyoto (JP)
PCT Filed Apr. 4, 2019, PCT No. PCT/JP2019/014909
§ 371(c)(1), (2) Date Dec. 14, 2020,
PCT Pub. No. WO2019/198605, PCT Pub. Date Oct. 17, 2019.
Claims priority of application No. 2018-077938 (JP), filed on Apr. 13, 2018.
Prior Publication US 2021/0116425 A1, Apr. 22, 2021
Int. Cl. G01N 30/14 (2006.01); B01D 11/02 (2006.01); B01D 11/04 (2006.01); B01D 15/20 (2006.01); B01D 15/40 (2006.01); B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/281 (2006.01); B01J 20/285 (2006.01); G01N 1/40 (2006.01); G01N 30/32 (2006.01); G01N 30/72 (2006.01); G01N 30/80 (2006.01); G01N 30/08 (2006.01); G01N 30/56 (2006.01)
CPC G01N 30/14 (2013.01) [B01D 15/206 (2013.01); B01D 15/40 (2013.01); B01J 20/261 (2013.01); B01J 20/267 (2013.01); B01J 20/28019 (2013.01); B01J 20/28052 (2013.01); B01J 20/281 (2013.01); B01J 20/285 (2013.01); G01N 1/405 (2013.01); G01N 30/32 (2013.01); G01N 30/7206 (2013.01); G01N 30/7233 (2013.01); G01N 30/80 (2013.01); B01D 11/0203 (2013.01); B01D 11/0403 (2013.01); B01J 20/28004 (2013.01); B01J 2220/54 (2013.01); G01N 2030/085 (2013.01); G01N 2030/328 (2013.01); G01N 2030/565 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for recovering an extracted component, the method comprising the steps of:
introducing carbon dioxide in a supercritical state and a modifier into a container that is disposed upstream of a back-pressure control valve and stores a sample, and extracting an agricultural chemical component contained in the sample;
introducing the agricultural chemical component that has been extracted into a trap column together with the carbon dioxide and the modifier, and collecting the agricultural chemical component in the trap column; and
introducing an eluent into the trap column to elute the agricultural chemical component, and recovering the agricultural chemical component that has been eluted,
wherein the trap column being loaded with polymer beads as a filler, and
a crosslinked polymer contained in the polymer beads has a degree of crosslinking of 50% or more,
wherein the agricultural chemical component is at least one selected from the group consisting of resmethrin, benthiocarb, bromophos-methyl, bifenthrin, tolchlofos-methyl, prothiofos, fenoxaprop-ethyl, nitralin, sulprophos, carbophenothion, hexythiazox, and silafluofen.