Patent ID: 9535027
Date: 2017-01-03
CPC Classifications: C12Q,G01N

Claim:
1. A sensor for determining the concentration of an analyte in a sample fluid, the sensor comprising: a first substrate having a proximal end and a distal end, the first substrate defining a first side edge and a second side edge of the sensor extending from the proximal end to the distal end of the first substrate, the distal end being configured and arranged for insertion into a sensor reader; a second substrate disposed over the first substrate; a working electrode disposed on one of the first and second substrates; a counter electrode disposed on one of the first and second substrates; a spacer disposed between the first and second substrates and defining a sample chamber that comprises the working electrode and the counter electrode; and a dry composition disposed on an area of the working electrode, the composition comprising an analyte detection reagent and electrically conductive particles, wherein the analyte detection reagent comprises an analyte-responsive enzyme and a redox mediator, wherein the analyte-responsive enzyme and the redox mediator are uniformly distributed on the area of the working electrode, wherein the electrically conductive particles provide for the uniform distribution of the analyte-responsive enzyme and the redox mediator on the area of the working electrode, wherein the conductive particles comprise nanoparticles or microspheres, wherein the dry composition is not disposed on the counter electrode.