US 12,436,128 B2
Peracetic acid concentration meter
Yoshihiko Kawaguchi, Kyoto (JP); and Satoko Kai, Kyoto (JP)
Assigned to HORIBA Advanced Techno, Co., Ltd., Kyoto (JP)
Appl. No. 17/637,545
Filed by HORIBA Advanced Techno, Co., Ltd., Kyoto (JP)
PCT Filed Aug. 12, 2020, PCT No. PCT/JP2020/030658
§ 371(c)(1), (2) Date Feb. 23, 2022,
PCT Pub. No. WO2021/039393, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-155838 (JP), filed on Aug. 28, 2019.
Prior Publication US 2022/0283112 A1, Sep. 8, 2022
Int. Cl. G01N 27/404 (2006.01); G01N 27/416 (2006.01)
CPC G01N 27/404 (2013.01) [G01N 27/416 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A diaphragm-type peracetic acid concentration meter that measures a peracetic acid concentration in a test solution comprising:
a diaphragm that is permeable to peracetic acid;
an internal solution in which peracetic acid that has permeated through the diaphragm is dissolved;
a working electrode and a counter electrode that are immersed in the internal solution; and
a permeation-inhibiting layer that is laminated onto a surface of the diaphragm on a side thereof that is in contact with the test solution, and that inhibits permeation of organic material, wherein
the permeation-inhibiting layer is provided with a semipermeable membrane; and
the permeation-inhibiting layer is further provided with a supporting substrate that supports the semipermeable membrane, wherein
in the permeation-inhibiting layer, the supporting substrate is laminated onto a surface of the diaphragm on a side thereof that is in contact with the test solution, while the semipermeable membrane is laminated onto a surface of the supporting substrate on the opposite side from the diaphragm.