Device and method for qualitative and quantitative analysis of heavy metals utilizing rotary disc system

A device for qualitative analysis and quantitative analysis comprising a rotatable platform and a plurality of microfluidic structures disposed radially and symmetrically on the rotatable platform, wherein each of the plurality of the microfluidic structures comprises:

• a top layer comprising a sample injection unit configured to receive an injection of a respective fluid sample containing heavy metals and a microfluidic siphon channel which is a passage providing fluid communication between the sample injection unit and one end of a first detection unit or a second detection unit;
• the first detection unit and the second detection unit each coated with an organic substance configured to produce a color development reaction with the heavy metals of the fluid sample;
• and
• a bottom layer including a portion into which the first detection unit or the second detection unit is inserted and a ruler configured to measure a color developed distance of the color development reaction,
• wherein each of the plurality of the microfluidic structures is configured to receive a different kind of the respective fluid samples than other ones of the plurality of the microfluidic structures,
• wherein the device is configured to move the respective fluid samples from the respective sample injection unit to the respective microfluidic channel and then to the respective first detection unit or the respective second detection unit when the rotatable platform is rotated,
• wherein the device is configured to provide a qualitative analysis of the fluid samples through the respective color development reaction of the heavy metals in the respective first detection unit or the respective second detection unit and the device is configured to provide a quantitative analysis of the fluid samples through measurement of the respective color developed distances,
• wherein one or more of a first subset of the microfluidic structures each has a respective one of the first detection units and one or more of a second subset of the microfluidic structures each has a respective one of the second detection units, each of the microfluidic structures that does not have one of the first detection units has a respective one of the second detection units, and each of the second detecting units has a width smaller than a width of each of the first detecting units, and
• wherein the device is configured to develop a same amount of each of the respective fluid samples only by capillary force without centrifugal force.