Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1984-12-27
1986-09-30
Tung, T.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204 1T, 204403, G01N 2746
Patent
active
046145770
ABSTRACT:
For determining the urea concentration in liquids in continuous operation, with a high sensitivity and reliable determination of the urea content over an extended period of time, an electrode which is separated from the urea containing liquid by means of a diaphragm with a diffusion coefficient of less than 10.sup.-7 cm.sup.2 s.sup.-1 for urea has impressed on it potentiostatically and cyclically, two potential values, the more positive potential being between 0.9 and 2.0. V/H.sub.2 rev, and the more negative potential being lower than 0.6 V/H.sub.2 rev, and at the more positive potential, the current flowing within a predetermined time interval is evaluated as the measuring signal.
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Gebhardt Ulrich
Luft Gunter
Mund Konrad
Siemens Aktiengesellschaft
Tung T.
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