Glucose strip is a kind of consumables used in blood glucose meter, coated with biological enzymes and can detect the presence of a certain glucose in peripheral blood through its color change.
The test strips are coated with an ultra-thin conductive layer (electrode). In blood glucose meter, a chemical coating (which contains either glucose oxidase or glucose dehydrogenase) is applied to the end of the strip. This biochemical mixture reacts with glucose in the tester's blood to generate an electric current. Some of the common blood glucose test strips on the market suck blood at the top, some suck blood at both sides, and some have blood on the surface. It is because the tracks opened during production are different. Finally, cut the prepared test strips into individual small test strips and seal them well to protect them from moisture and oxidation, which will affect the test results.
Principle of glucose strip
The blood glucose test strip consists of two sheets containing sensitive chemical components. Drop the blood on the test area, put the test strip flat for one minute and then flush the blood. Compared with the standard color guide, the chemical reaction will produce different degrees of color changes according to the glucose content in the blood. Glucose oxidase on the test strip, peroxidase reacts with glucose in the blood. A color indicator accompanying the reaction and non-reactive components will appear in the test area.
The working principle of a common blood glucose meter: glucose in the blood reacts with glucose oxidase and potassium ferricyanide immobilized on the surface of the test strip to produce gluconic acid and potassium ferrocyanide. The blood glucose meter applies a constant working voltage to the test strip to oxidize potassium ferrocyanide to potassium ferricyanide to generate an oxidation current. The magnitude of the oxidation current is proportional to the glucose concentration. The blood glucose meter records the magnitude of the oxidation current and converts it to out the concentration of glucose.
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