G - Physics – 01 – N
Patent
G - Physics
01
N
324/23
G01N 27/49 (2006.01) G01N 27/403 (2006.01) G01N 30/64 (2006.01) G01N 33/68 (2006.01) G01N 30/02 (2006.01) G01N 30/34 (2006.01)
Patent
CA 1167526
ABSTRACT OF THE INVENTION An electrochemical detection apparatus is provided. The apparatus comprises a flow-cell having at least one active testing electrode at least one reference electrode, and at least one counter electrode. Each electrode comprises a liquid impervious solid body having a bore extending there- through with the electrode active surface located in the bore. The electrodes are arranged in a stack, electrically insulated from one another with their respective bores aligned so as to define a flow channel through which liquid to be detected can be passed. In a preferred embodiment of the invention at least one of the reference electrodes is actively driven to supply a stable reference potential against which other electrochemical responses can be measured. Various electro- chemical responses are achieved by varying the construction, number and arrangement of electrodes in the stack, and the potentials applied to the electrodes. The detection apparatus has particular utility for use in monitoring chromatographic eluant.
367650
Environmental Sciences Associates Inc.
Mcfadden Fincham
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