Chemistry: electrical and wave energy – Processes and products
Patent
1982-07-19
1985-03-19
Tung, T.
Chemistry: electrical and wave energy
Processes and products
204402, 204403, 204415, G01N 2746
Patent
active
045057842
ABSTRACT:
For determining the urea concentration in liquids in continuous operation, with 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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