Title:
CONCENTRATION METHOD FOR ANALYSIS SOLUTION USING POSITIVE OSMOSIS MEMBRANE, AND ANALYSIS METHOD
Document Type and Number:
WIPO Patent Application WO/2023/033069
Kind Code:
A1
Abstract:
The present invention is a concentration method for concentrating, before performing analysis using an analysis device, an analysis solution that includes an analysis solute and an analysis solvent. The concentration method is based on positive osmosis in which, using a concentration device, the analysis solution and the induction solution are brought into mutual contact via a positive osmosis membrane so that the analysis solvent within the analysis solution is removed by being allowed to pass through the positive osmosis membrane and be transferred into the induction solvent. The concentration device includes: a positive osmosis membrane module including the positive osmosis membrane; an analysis solution tank; analysis solution feed piping; an induction solution tank; and induction solution feed piping. The total of the capacity of an analysis solution fluid flow section of the positive osmosis membrane module and the capacity of the analysis solution feed piping is 500 mL or less. The concentration of the analysis solute in the analysis solution is 0.01 ppm or less, and the concentration of the analysis solute in the analysis solution after concentration is 0.02 ppm or greater.
More Like This:
Inventors:
KATAYAMA YUJI (JP)
MIKAWA MASATO (JP)
OSAKI TAKAHIRO (JP)
MIKAWA MASATO (JP)
OSAKI TAKAHIRO (JP)
Application Number:
PCT/JP2022/032842
Publication Date:
March 09, 2023
Filing Date:
August 31, 2022
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
B01D61/00; B01D63/00; B01D63/02; B01D63/06; B01D69/00; B01D69/02; B01D69/04; B01D69/06; B01D69/08; B01D69/10; B01D69/12; B01D71/16; B01D71/34; B01D71/36; B01D71/38; B01D71/42; B01D71/52; B01D71/56; B01D71/58; B01D71/60; B01D71/62; B01D71/64; B01D71/68; B01D71/72; B01D71/76; B01D71/82; G01N1/10; G01N1/40; G01N30/06
Domestic Patent References:
| WO2020241865A1 | 2020-12-03 |
Foreign References:
| JP2018001150A | 2018-01-11 | |||
| JP2009092564A | 2009-04-30 | |||
| JP2020196007A | 2020-12-10 | |||
| JP2004077299A | 2004-03-11 | |||
| JP2009092564A | 2009-04-30 |
Other References:
"CAS", Database accession no. 6104-59-2
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Download PDF: