Provided is a glycated hemoglobin measuring apparatus. The apparatus for measuring glycated hemoglobin includes a cartridge for receiving blood and a plurality of chemicals, a rotating tray for rotating the cartridge, wherein the cartridge is disposed inside the rotating tray, a driver having a nozzle disposed above the cartridge and movable in a vertical direction, and a measurement unit located above the cartridge and measuring glycated hemoglobin of the blood, wherein the driver sucks at least one of the blood, the plurality of chemicals, and mixed solution of the blood and the plurality of chemicals into the nozzle or discharges the sucked at least one into the cartridge such that the blood is chemically treated through the plurality of chemicals.

This invention provides an HbA1c dehydrogenase that is capable of directly acting on hemoglobin A1c and is less likely to be influenced by oxygen concentration and a method for measurement and a kit of assay reagents using such HbA1c dehydrogenase. The HbA1c dehydrogenase having dehydrogenase activity and capable of directly acting on HbA1c is obtained by substitution of one or more amino acid residues at positions corresponding to positions 280, 269, 54, 241, and 267 of the amadoriase that is capable of directly acting on hemoglobin A1c and is derived from, for example, the genus Coniochaeta. This invention also provides a method for measurement of HbA1c, a kit of assay reagents, and a sensor using such HbA1c dehydrogenase. Such HbA1c dehydrogenase is capable of directly acting on hemoglobin A1c and has lowered oxidase activity and/or enhanced dehydrogenase activity. This not only eliminates the need for treatment of hemoglobin A1c with a protease but also enables the use of an electron mediator in the measurement of HbA1c, thereby reducing effects due to oxygen concentration, and enables HbA1c measured with high sensitivity.

A sample collection device includes a grip portion and a collection portion connected to the grip portion, wherein the collection portion includes a first surface and a capillary having a groove shape provided on the first surface and formed with openings at opposite ends thereof.

A measurement method includes a measurement step of measuring a first single value and a second signal value, the first signal value being based on a reaction between a first reacting substance and the sample, the second signal value being based on a reaction between a second reacting substance and the sample, the first reacting substance having a higher reactivity to a second detection target than to a first detection target, the second reacting substance having a higher reactivity to the first detection target than to the second detection target.

Provided is a glycated protein sensor provided with: immobilized protease; immobilized ketoamine oxidase; and a hydrogen peroxide detection section.

The present disclosure relates to methods of detecting various analytes, including glycated hemoglobin (HbA1c) and total hemoglobin (THb), in a biological sample obtained with a microsampling device.

Methods of detecting and flagging and/or suppressing aberrant results caused by incomplete dispersion of an immunoassay reagent used in a turbidimetric immunoassay are disclosed.

A sensor according to a first embodiment of the present invention includes a flow channel to permit passage of a specimen, a first detection part that is located in the flow channel and has a first ligand specifically bindable to a first material in the specimen, and a second detection part that is located downstream of the first detection part in the flow channel and has a second ligand specifically bindable to the first material and/or a second material in the specimen.

A sensor for the detection of HbA1c in a sample includes a substrate, a working electrode and counter electrode formed on a surface of the substrate, and an anti-HbA1c antibody functionalized or chemically functionalized to a surface of an exposed portion of the working electrode.

Provided is a method for measuring a glycoprotein using an enzymatic method, and the method includes simplified steps.