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ID 15789
Eprint ID
15789
FullText URL
Author
Korenaga Takashi
Moriwake Tosio
Takahashi Teruo
Abstract
Three methods for determining chemical oxygen demand (COD) by means of flow injection analysis (FIA) with potassium permanganate, potassium dichromate, or cerium(IV) sulfate as oxidant, developed in this laboratory, are described from the point of view of their operating properties. The permanganate method is the most sensitive and common, but forms manganese(IV) oxide precipitate which blocks the FIA lines and connectors. Addition of phosphoric acid in the reagent system is, however, effective to some extent in order to avoid blocking the flow system. The dichromate method is the most workable and stable, but produces toxic wastes containing chromium(VI). The cerium method is the most probable because cerium(IV) is the strongest oxidant of the three and less poisonous. The last method with cerium(IV) sulfate is therefore recommendable to apply to the continuous monitoring of COD in many situation.
Published Date
1984-11-26
Publication Title
Memoirs of the School of Engineering, Okayama University
Publication Title Alternative
岡山大学工学部紀要
Volume
volume19
Issue
issue1
Publisher
岡山大学工学部
Publisher Alternative
School of Engineering, Okayama University
Start Page
53
End Page
62
ISSN
0475-0071
NCID
AA00733903
Content Type
Departmental Bulletin Paper
language
英語
File Version
publisher
Refereed
False
Eprints Journal Name
mfe