Title:
METHOD AND DEVICE FOR MEASURING HYDROGEN PEROXIDE CONCENTRATION IN WATER CONTAINING HYDRAZINE
Document Type and Number:
Japanese Patent JP3525996
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make accurately measurable hydrogen peroxide concentration in water containing hydrazine by measuring the hydrogen peroxide concentration using the phenolphthalein method, and by measuring hydrazine concentration for correcting the hydrogen peroxide concentration.
SOLUTION: Hydrogen peroxide concentration in water containing hydrazine is measured by the phenolphthalein method. Besides, hydrazine concentration in the water containing hydrazine is measured (preferably, the p- dimethylaminobenzaldepyde absorptiometric analysis method should be used). In the phenolphthalein method, since one part of the hydrazine is also determined as the hydrogen peroxide (for example, approximately 1/3 of the hydrazine concentration is determined as the hydrogen peroxide in reaction time of 15 minutes), the amount of the concentration where the hydrazine is measured as the hydrogen peroxide is estimated according to the hydrazine concentration, the amount of the concentration is subtracted from the measurement value of the hydrogen peroxide, and the obtained result is used as an actual hydrogen peroxide concentration.
Inventors:
Okugawa, Katsumi
Application Number:
JP30636697A
Publication Date:
May 10, 2004
Filing Date:
October 22, 1997
Export Citation:
Assignee:
JAPAN ORGANO CO LTD
International Classes:
G01N31/00; G01N21/77; G21F9/12; (IPC1-7): G01N21/77; G01N31/00; G21F9/12
Attorney, Agent or Firm:
三浦 進二
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