Electrode, electrochemical sensor and apparatus, and methods for operating the same

摘要: The application is directed to the amperometric detection of proteins, especially haemoglobin in faeces, using an electrochemical sensor (1). comprises: a working electrode (2a, 2b) having electrically conductive matrix holding first reagent and/or second reagent, being oxidising agent, or precursor thereof, for reagent; counter (4) and optionally reference (3); wherein reaction between agent catalysed by protein provide detectable signal at electrode. carbon- graphite-containing porous matrix. preferably 3, 3', 5, 5' - tetramethylbenzidine (CAS RN = 54827-17-7) hydrogen peroxide, such as urea peroxide 124-43-6), sodium perborate. Also claimed are kit testing stools, comprising sensor, method preparing