A flow-through electrochemical cell distinguished by the feature of a working electrode comprising selected carbon black powder(s) dispersed within an inert binder. An outstanding characteristic of the invention is the markedly improved signal/noise ratio of the electrode which enables a significant...http://www.google.de/patents/US4343767?utm_source=gb-gplus-sharePatent US4343767 - Chromatography apparatus with electrochemical detector having carbon-black containing working electrode
