Method and apparatus for the continuous monitoring of specific e

Details Method and apparatus for the continuous monitoring of specific e Method and apparatus for the continuous monitoring of specific e

1984-11-23

1987-02-24

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204422, 204433, 204435, G01N 2730

Patent

active

046455710

ABSTRACT:
The continuous monitoring of an element in a molten substance containing same is effected by monitoring the electromotive force generated between a first electrode in contact with the substance and a second electrode in contact with a reference material which is separated from the substance by a solid electrolyte. The reference material comprises a metal and at least one salt selected from the group consisting of (a) a combined salt of the metal and a monovalent metal, (b) a mixture of a first salt of the metal and a second salt of the monovalent metal, the first and second salts having a common anion, (c) a mixture of the first salt and the combined salt, and (d) a mixture of the second salt and the combined salt, the at least one salt being present in the form of a slurry containing a liquid phase in equilibrium with a solid phase, the liquid phase containing the metal and monovalent metal in ionic form and the solid phase containing the first salt, second salt or combined salt. The use of such a reference material enables one to obtain reproducible results and to minimize the polarizability of the electrodes.

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patent: 4085023 (1978-04-01), Fray
patent: 4166021 (1979-08-01), Ross, Jr. et al.
patent: 4414093 (1983-11-01), Redey et al.
patent: 4428770 (1984-01-01), Worrell et al.

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