Microdevice for detecting aldehydes or ketones

A device for detecting aldehydes or ketones comprising:

• a disk-shaped rotatable platform;
• and
• a microfluidic structure disposed on the disk-shaped rotatable platform, the microfluidic structure comprising:
• a sample injection part configured to inject a fluidic sample containing aldehydes or ketones to subject the aldehydes or the ketones to DNPH derivatization, wherein an inside of the sample injection part is configured to be filled with 2,4-DNPH coated silica in the form of beads;
• a first microfluidic channel having a passage configured to deliver the fluidic sample to a detection part and the first microfluidic channel having a first end in direct connection to the sample injection part and a second end in direct connection to the detection part;
• an eluent introduction part configured to inject an eluent;
• a second microfluidic channel having a passage configured to deliver the eluent to the detection part and the second microfluidic channel connects the eluent introduction part and the detection part;
• a reserve area connecting the second microfluidic channel and the detection part and accommodating one end of the detection part;
• a first air circulation channel connecting the sample injection part and the other end of the detection part;
• a second air circulation channel connecting the eluent introduction part and the other end of the detection part;
• and wherein the detection part is coated with a substance configured to react with the aldehydes or the ketones contained in the fluidic sample so that the aldehydes or the ketones is separated and developed by the eluent,
• wherein upon rotation of the disk-shaped rotatable platform, the aldehydes or the ketones injected into the sample injection part are subjected to the DNPH derivatization,
• wherein the disk-shaped rotatable platform is formed by stacking an upper layer part and a lower layer part,
• wherein the eluent introduction part has space to accommodate the eluent and the space contains an inlet into which the eluent can be injected,
• wherein the inlet of the eluent introduction part is formed on the upper layer part.