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Some Techniques in Polarography

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2 Author(s)
L. Katz ; Experimental Surgery Laboratory, Hôpital Notre Dame, Montreal 24, Canada ; E. D. Gagnon

The basic polarographic circuit and its accuracy is discussed. A bridge-type current amplifier, using one transistor, is presented as one solution to the problem of displaying the very small current flow in a polarographic circuit. A second solution, the insertion of a pH-millivoltmeter directly into the basic control circuit, is evaluated from the medical worker's viewpoint. Techniques and circuits employing four different types of pH-millivoltmeters are described. The direct application of a polarographic cell for continuous measurement of the oxygen partial pressure in the blood of a heartlung machine is presented.

Published in:

IRE Transactions on Bio-Medical Electronics  (Volume:8 ,  Issue: 2 )