Method of electrically measuring the concentration of acids

Details Method of electrically measuring the concentration of acids Method of electrically measuring the concentration of acids

1989-03-14

1991-01-29

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415321, 204400, 204402, 204412, 204433, 204434, G01N 2726

Patent

active

049884182

ABSTRACT:
In a method for the electrical measurement of the concentration of acids a measurement electrode (11) consisting at least predominantly of crystalline graphite is arranged in an acid (12) having anions which form graphite intercalation compounds with graphite. The measurement electrode (11) is then intercalated by generating in the measurement electrode (11), at a variable positive potential, a current of such a size that the anions of the acids (12) can from graphite intercalation compounds with the graphite. The current is maintained until the intercalation compounds have formed at the surface. The potential at the measurement electrode (11) is then measured and used as a measure for the acid concentration. The measurement electrode (11) is subsequently deintercalated again.

REFERENCES:
patent: 4505784 (1985-03-01), Mund et al.
patent: 4566949 (1986-01-01), Berger
Beck et al, "Graphite Intercalation Compounds as Positive Electrode in Galvanic Cells", Electrochem Acta, (26), 1981, pp. 799-809.

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