Patent ID: 7944219
Filing Date: 2011-05-17
Classification: G01N

Abstract:
1. An amperometric electrochemical sensor which comprises a microelectrode, drive means for the microelectrode, a current to voltage converter, measurement circuits for chronoamperometric different conditions, signal processing means, and sampling means, the amperometric electrochemical sensor being such that the drive means supplies successive pulsed chronoamperometric different conditions to the microelectrode, the microelectrode and the current to voltage converter produce a sequence of different voltages consequent upon receiving the chronamperometric different conditions and correlate the received chronoamperometric different conditions with their respective measurement circuits, and the signal processing means interrogates only the microelectrode output signal corresponding to a particular voltage in the sequence of different voltages and thereby produces a single sensor output corresponding to each separate voltage in the sequence of different voltages whereby interrogation of the amperometric electrochemical sensor is facilitated, and the microelectrode output corresponding to a particular voltage in the sequence of different voltages is only interrogated in the early part of the microelectrode output signal when the microelectrode output signal is at its highest and before it reaches a steady state.