Rapid and automated analytical methods for redox species based on potentiometric flow injection analysis using potential buffers

Hiroki Ohura, Toshihiko Imato

Research output: Contribution to journalReview article

5 Citations (Scopus)

Abstract

Two analytical methods, which prove the utility of a potentiometric flow injection technique for determining various redox species, based on the use of some redox potential buffers, are reviewed. The first is a potentiometric flow injection method in which a redox couple such as Fe(III)-Fe(II), Fe (CN) 6 3 - -Fe(CN) (CN) 6 4 -, and bromide-bromine and a redox electrode or a combined platinum-bromide ion selective electrode are used. The analytical principle and advantages of the method are discussed, and several examples of its application are reported. Another example is a highly sensitive potentiometric flow injection method, in which a large transient potential change due to bromine or chlorine as an intermediate, generated during the reaction of the oxidative species with an Fe(III)-Fe(II) potential buffer containing bromide or chloride, is utilized. The analytical principle and details of the proposed method are described, and examples of several applications are described. The determination of trace amounts of hydrazine, based on the detection of a transient change in potential caused by the reaction with a Ce(IV)-Ce(III) potential buffer, is also described.

Original languageEnglish
Article number516165
JournalJournal of Automated Methods and Management in Chemistry
Volume2011
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Chemical Engineering (miscellaneous)
  • Instrumentation
  • Computer Science Applications

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