Patent ID: 8834702
Filing Date: 2014-09-16
Classification: C12Q,G01N

Abstract:
1. A method of estimating if sufficient sample is supplied, including: providing a biosensor, the biosensor including an insulative substrate, a reaction layer, a covering layer and a sample introducing port, the insulative substrate having an electrode system on a surface thereof, the electrode system at least including a working electrode, a counter electrode and a third electrode, wherein the third electrode is nearer to the sample introducing port than the counter electrode, the reaction layer at least covering the working electrode; applying a sample liquid to the biosensor; applying a voltage between the working electrode ( turning off the electrical circuit connecting the working electrode ( applying a voltage between the working electrode ( comparing a bias between the first current value and the second current value them with the a predetermined threshold, wherein (i) if the bias is greater than the predetermined threshold, estimating that the supplied sample liquid cannot meet the test requirement, and (ii) if the bias is less than the predetermined threshold, then estimating that the supplied sample liquid can meet the test requirement.