Microdevice for detecting aldehydes or ketones

A device for detecting aldehydes or ketones, comprising:

• a rotary platform of a disk shape;
• and
• a microfluidic structure disposed on the rotary platform, wherein the microfluidic structure includes:
• a sample storage unit into which a fluid sample containing aldehydes or ketones can be injected to derivatize the aldehydes or the ketones;
• an eluent storage unit into which an eluent can be injected;
• a separation unit having a thin layer chromatography plate configured to receive the sample from the sample storage unit and the eluent from the eluent storage unit, to separate the aldehydes or the ketones of the sample and to deploy the aldehydes or the ketones of the sample with the eluent;
• a first microfluidic channel configured to move the sample to the separation unit, and which connects the sample storage unit and the separation unit;
• a second microfluidic channel configured to move the eluent to the separation unit, and which connects the eluent storage unit and the separation unit;
• and
• an absorption pad configured to receive the eluent from the eluent storage unit and to discharge the eluent to the thin layer chromatography plate, wherein the separation unit includes a sample introduction portion for receiving the sample from the sample storage unit;
• an eluent introduction portion for receiving the eluent from the eluent storage unit;
• and
• a deployment portion configured to separate the aldehydes or the ketones of the sample and to deploy the aldehydes or the ketones of the sample with the eluent, and the absorption pad is provided in the eluent introduction portion, wherein the center of rotation at which a rotational axis of the rotary platform provided in the rotary platform is the center of the rotary platform, a longitudinal direction of the separation unit is a radial direction of the rotary platform, and the deployment portion is a position farther from the center of rotation than the sample introduction portion and the eluent introduction portion are from the center of rotation, wherein the rotary platform is configured to rotate in a first direction perpendicular to a surface of the rotary platform in a rotational direction of the rotational axis, the thin layer chromatography plate on which the eluent can be deployed by a capillary force is disposed across the deployment portion and the eluent introduction portion in the separation unit such that a longitudinal direction of the thin layer chromatography plate points in a direction of a centrifugal force generated by a rotation, and the eluent can be discharged from the eluent introduction portion to the deployment portion, and can be propelled in the deployment portion by a combined force of the capillary force and the centrifugal force, wherein the first microfluidic channel comprises one or more first microfluidic bent portions and the second microfluidic channel comprises two or more second microfluidic bent portions and wherein a number of the two or more second microfluidic bent portions of the second microfluidic channel is more than a number of the one or more first microfluidic bent portions of the first microfluidic channel.