Title:
METHOD OF EVALUATING ORGANIC SUBSTANCES IN ULTRAPURE WATER, AND ORGANIC SUBSTANCE IDENTIFICATION METHOD IN ULTRAPURE WATER PRODUCTION SYSTEM
Document Type and Number:
Japanese Patent JP2020134434
Kind Code:
A
Abstract:
To provide a method of evaluating organic substances in ultrapure water of an ultrapure water production system and a method of identifying a causative substance and a place of occurrence in membrane fouling at outlets of the system.SOLUTION: A method of evaluating organic substances includes: a first step (sampling step A) of sampling ultrapure water of an ultrapure water production system; a second step (adhesion step B) of passing the sampled ultrapure water through a porous body and causing organic substances in the ultrapure water to be absorbed onto the porous body; a third step (eluting step C) of eluting the organic substances from the porous body in which the organic substances are concentrated to obtain an eluate; a fourth step (measurement step D) of measuring the eluate by fluorography; and a fifth step (evaluation step E) of evaluating the organic substances in the ultrapure water on the basis of the measurement in the fourth step. Identifying a location of membrane fouling is identifying, by fluorography, a location where the same fluorescence peaks occur by comparing the fluorescence peaks of the organic substances on the filtration membrane in which membrane fouling occurs with the fluorescence peaks obtained by the above method from the outlet water of each device of the production system.SELECTED DRAWING: Figure 1
More Like This:
| WO/2012/026048 | METHOD FOR NONDESTRUCTIVELY INSPECTING PEARL QUALITIES |
| JP6421821 | Detection device |
| WO/2021/138900 | FLUORESCENCE IMMUNOCHROMATOGRAPHY TEST STRIP REAL-TIME DETECTION SYSTEM |
Inventors:
TSUDA AKIHIKO
Application Number:
JP2019031452A
Publication Date:
August 31, 2020
Filing Date:
February 25, 2019
Export Citation:
Assignee:
ORGANO KK
International Classes:
G01N21/64; G01N1/10
Domestic Patent References:
| JPS6332342A | 1988-02-12 | |||
| JP2009156657A | 2009-07-16 | |||
| JP2017227577A | 2017-12-28 | |||
| JP2016107235A | 2016-06-20 | |||
| JP2012192315A | 2012-10-11 | |||
| JP2001153854A | 2001-06-08 | |||
| JP2003275760A | 2003-09-30 |
Foreign References:
| US20120001094A1 | 2012-01-05 |
Attorney, Agent or Firm:
Akio Miyazaki
Masaaki Ogata
Masaaki Ogata