Method for simultaneously detecting glucose concentration and percentage of glycated hemoglobin in single test strip
A test strip includes a working electrode including a conductive layer and an electro-catalytic layer deposited on the conductive layer. A method for simultaneously detecting a glucose concentration and a percentage of glycated hemoglobin in a single test strip includes following steps: providing a blood sample, providing the aforementioned test strip, performing a sample injecting step, performing an initial step, performing a first detecting step, performing a second detecting step, performing a third detecting step, performing a first analyzing step, and performing a second analysis step.
1. A method for simultaneously detecting a glucose concentration and a percentage of glycated hemoglobin in a single test strip, comprising:
providing a blood sample;
providing a test strip, the test strip comprising:
a working electrode comprising:
a conductive layer; and
an electro-catalytic layer deposited on the conductive layer, wherein the electro-catalytic layer comprises a porous structure;
performing a sample injecting step, wherein the blood sample is injected into the electro-catalytic layer;
performing an initial step, wherein an initial voltage is provided to the test strip;
performing a first detecting step, wherein a first current signal value of the test strip is obtained at a first detecting potential at a first detection time point;
performing a second detecting step, wherein a background current signal value of the test strip is obtained at a second detecting potential at a second detection time, the second detecting potential is smaller than the first detecting potential, and a potential difference between the second detecting potential and the first detecting potential ranges from 0.05 V to 0.8 V;
performing a third detecting step, wherein a redox signal value of the test strip is detected at the second detecting potential at a third detection time point;
performing a first analyzing step, wherein the first current signal value is compared with a glucose concentration reference data to determine the glucose concentration in the blood sample; and
performing a second analysis step, wherein the redox signal value is compared with a glycated hemoglobin concentration reference data and then calculated a HbA1c signal value, the HbA1c signal value is divided by the background current signal value to obtain an electrochemical signal value, and the electrochemical signal value is compared with a glycated hemoglobin percentage reference data to determine the percentage of glycated hemoglobin in the blood sample.
2. The method for simultaneously detecting the glucose concentration and the percentage of glycated hemoglobin in the single test strip of claim 1 , wherein the sample injecting step, the initial step, the first detecting step, the second detecting step, and the third detecting step are sequentially performed, and a total detection time of the sample injecting step to the third detecting step is from 10 seconds to 60 seconds.
3. The method for simultaneously detecting the glucose concentration and the percentage of glycated hemoglobin in the single test strip of claim 1 , wherein a material of the electro-catalytic layer is a metal oxide or a metal hydroxide.
4. The method for simultaneously detecting the glucose concentration and the percentage of glycated hemoglobin in the single test strip of claim 3 , wherein the metal oxide is RuO 2 , NiO, CuO or Al 2 O 3 .
5. The method for simultaneously detecting the glucose concentration and the percentage of glycated hemoglobin in the single test strip of claim 3 , wherein the metal hydroxide is Ru(OH) 2 , NiOOH, CuOOH, Au(OH) 2 or PtOH.
6. The method for simultaneously detecting the glucose concentration and the percentage of glycated hemoglobin in the single test strip of claim 1 , wherein a pore size of the porous structure ranges from 200 nm to 400 nm.