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Title: Reference electrode for strong oxidizing acid solutions

A reference electrode for the measurement of the oxidation-reduction potentials of solutions is especially suitable for oxidizing solutions such as highly concentrated and fuming nitric acids, the solutions of nitrogen oxides, N.sub.2 O.sub.4 and N.sub.2 O.sub.5, in nitric acids. The reference electrode is fabricated of entirely inert materials, has a half cell of Pt/Ce(IV)/Ce(III)/70 wt. % HNO.sub.3, and includes a double-junction design with an intermediate solution of 70 wt. % HNO.sub.3. The liquid junctions are made from Corning No. 7930 glass for low resistance and negligible solution leakage.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. (Livermore, CA)
  2. (Castro Valley, CA)
  3. (Pleasanton, CA)
  4. (Brentwood, CA)
Publication Date:
OSTI Identifier:
867229
Report Number(s):
US 4891124
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Research Org:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Country of Publication:
United States
Language:
English
Subject:
reference; electrode; strong; oxidizing; acid; solutions; reference; electrode; measurement; oxidation-reduction; potentials; solutions; especially; suitable; oxidizing; solutions; highly; concentrated; fuming; nitric; acids; solutions; nitrogen; oxides; nitric; acids; reference; electrode; fabricated; entirely; inert; materials; half; cell; iii; 70; wt; hno; double-junction; design; intermediate; solution; 70; wt; hno; liquid; junctions; corning; 7930; glass; resistance; negligible; solution; leakage; nitrogen oxide; acid solutions; inert material; acid solution; nitrogen oxides; nitric acid; nitric acid; reference electrode; reference electrode; reference electrode; especially suitable; highly concentrated; reduction potential; oxidizing acid; inert materials; strong oxidizing; oxidizing solution; oxidation-reduction potential; intermediate solution /204/