Reference electrode for strong oxidizing acid solutions

Details Reference electrode for strong oxidizing acid solutions Reference electrode for strong oxidizing acid solutions

1989-05-23

1990-01-02

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

G01N 2726

Patent

active

048911240

ABSTRACT:
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.

REFERENCES:
patent: 4282081 (1981-08-01), Arrance, Sr.

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