| 摘要 |
<p>Method and electrodes (individual or composite) for detection and measurement of hydrogen peroxide by electrolytic analysis (especially amperometrically), in which the electrode has a surface coating of selective permeability formed by electrolytically oxidising a phenolic compound (especially phenol itself or dopamine). This is especially applicable to examination of biological samples, e.g. blood or serum. The electrode is preferably platinum, and during the coating procedure and/or use may be surrounded with a permeable membrane (e.g. polymer, and especially a polycarbonate 0.03 to 0.05 νm thick). The properties of the coating may be controlled, e.g. by the applied voltage for the oxidation, and is usually 0.1 νm or less in thickness. One form of assembly uses such a coated electrode as anode, with a surrounding cathode and a membrane retaining an electrolyte, preferably buffered. The hydrogen peroxide may be present as such or produced by an enzyme system.</p> |
