Patent ID: 7018848

Claim:
A method for determining the presence or concentration of an analyte in an aqueous fluid sample, said method comprising: (a) providing an electrochemical test device comprising: (i) a single substrate, the single substrate comprising a non-conductive coating affixed to one side of a flexible material; (ii) a working electrode comprising an amorphous semiconductor material affixed to the non-conductive coating, said working electrode having an first electrode area, a first lead and a first contact pad; (iii) a counter electrode comprising an amorphous semiconductor material affixed to the non-conductive coating, said counter electrode having a second electrode area, a second lead, and a second contact pad; and (iv) a reagent capable of reacting with the analyte to produce a measurable change in potential which can be correlated to the presence or concentration of the analyte in the fluid sample, said reagent overlaying at least of portion of the first electrode area of the working electrode; (b) inserting the electrochemical test device into a meter device; (c) applying a sample of art aqueous fluid to the first electrode area of the working electrode; and (d) reading the meter device to determine the presence or concentration of the analyte in the fluid sample.