US 11,835,535 B2
Device and method for qualitative and quantitative analysis of heavy metals utilizing rotary disc system
Byung Hyun Park, Daejeon (KR); Byoung Hyoun Kim, Daejeon (KR); Dong Hyun Kim, Daejeon (KR); and Su Youn Han, Daejeon (KR)
Assigned to LG Chem, Ltd.
Appl. No. 16/629,994
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Oct. 25, 2018, PCT No. PCT/KR2018/012732
§ 371(c)(1), (2) Date Jan. 28, 2020,
PCT Pub. No. WO2019/098561, PCT Pub. Date May 23, 2019.
Claims priority of application No. 10-2017-0154395 (KR), filed on Nov. 20, 2017; and application No. 10-2018-0053637 (KR), filed on May 10, 2018.
Prior Publication US 2020/0141962 A1, May 7, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 21/78 (2006.01); G01N 31/22 (2006.01); G01N 21/75 (2006.01); G01N 21/77 (2006.01); G01N 35/10 (2006.01); G01N 35/08 (2006.01); B01L 3/00 (2006.01); G01N 33/20 (2019.01)
CPC G01N 35/1095 (2013.01) [B01L 3/5027 (2013.01); B01L 3/50273 (2013.01); B01L 3/502715 (2013.01); G01N 21/78 (2013.01); G01N 31/22 (2013.01); G01N 33/20 (2013.01); G01N 35/08 (2013.01); B01L 2200/16 (2013.01); B01L 2300/06 (2013.01); B01L 2300/0803 (2013.01); B01L 2300/126 (2013.01); B01L 2300/16 (2013.01); B01L 2400/0475 (2013.01)] 13 Claims
OG exemplary drawing
 
1. 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 sample injection unit configured to receive an injection of a respective fluid sample containing heavy metals, an entirety of the sample injection unit being located in a top layer of the rotatable platform, the sample injection unit including a space configured to receive an entirety of the respective fluid sample stored therein and an opening configured to receive the injection of the respective fluid sample;
a microfluidic siphon channel which is a passage providing fluid communication between the sample injection unit and one end of a detection unit;
the detection unit coated with an organic substance configured to produce a color development reaction with the heavy metals of the fluid sample, the detection unit being inserted onto a portion of a bottom layer of the rotatable platform, the detection unit being sandwiched between the top layer and the bottom layer of the rotatable platform; and
a ruler configured to measure a color developed distance of the color development reaction, the ruler being located on the bottom layer of the rotatable platform,
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 siphon channel and then to the respective detection unit when the rotatable platform is rotated,
wherein the device is configured to provide the qualitative analysis of the fluid samples through the respective color development reaction of the heavy metals in the respective detection unit and the device is configured to provide the quantitative analysis of the fluid samples through measurement of the respective color developed distances,
wherein each detection unit comprises a respective development area coated with the organic substance and a respective reservoir area connecting the respective microfluidic siphon channel with the respective development area, and
wherein the development area of each detection unit is located closer to a center of the rotatable platform than the reservoir area of the detection unit, such that each detection unit is configured to move the respective fluid sample from the reservoir to the development area in a direction from a periphery of the rotatable platform towards the center of the rotatable platform via a capillary force.