Method of measuring quantity of substrate

Abstract

A method of measuring a quantity of a substrate contained in sample liquid is provided. This method can reduce measurement errors caused by a biosensor. The biosensor includes at least a pair of electrodes on an insulating board and is inserted into a measuring device which includes a supporting section for supporting detachably the biosensor, plural connecting terminals to be coupled to the respective electrodes, and a driving power supply which applies a voltage to the respective electrodes via the connecting terminals. One of the electrodes of the biosensor is connected to the first and second connecting terminals of the measuring device only when the biosensor is inserted into the measuring device in a given direction, and has a structure such that the electrode becomes conductive between the first and second connecting terminals due to a voltage application by the driving power supply.

1 - 33 . (canceled) 
     
     
         34 . A method of measuring a quantity of a substrate, comprising:
 providing a biosensor to which sample liquid containing a substrate is supplied;   providing a measuring device which includes a temperature measuring unit measuring a temperature inside the measuring device;   detecting a temperature change between a temperature measured before the quantity of the substrate is measured and a temperature measured when the quantity of the substrate is measured; and   determining, according to the temperature change, whether the quantity of the substrate is measured or not.   
     
     
         35 . The method of  claim 34 , further comprising stopping measurement of the substrate when the temperature change exceeds a predetermined threshold. 
     
     
         36 . The method of  claim 34 , wherein the step of detecting the temperature change comprises intermittently detecting the temperature measured before the quantity of the substrate is measured. 
     
     
         37 . The method of  claim 34 , wherein the temperature measuring unit of the measuring device comprises a plurality of temperature measuring sections for measuring values of the temperature inside the measuring device.