title: An enzyme-linked immunosorbent assay on a centrifugal platform using magnetic beads.
abstract: An automated, disk-based, enzyme-linked immunosorbent assay (ELISA) system is presented in this work. Magnetic beads were used as the antibody carriers to improve the assay sensitivity and shorten the reaction time. The magnetic module integrated on the system is capable of controlling the magnetic beads to either move in the incubation stage or immobilize at a specific location during washing stage. This controlling mechanism utilizes a passive controlling approach so that it can be performed through disk spinning without the need of active control from external devices. The movement of the magnetic beads was investigated and the optimal rotational speed was found to be related to the ratio of the processing time to the cycle time of the magnetic beads. Comparing to ELISA conducted on microtiter plates, similar test results could be achieved by the disk-based ELISA but the entire protocol can be finished automatically within 45 min with much less reagent consumption.
authors.affiliation: Department of Chemical Engineering, Feng Chia University , 100 Wenhwa Road, Taichung 40724, Taiwan.
authors.forename: Chih-Hsin
authors.initials: CH
authors.lastname: Shih
authors.affiliation: Department of Chemical Engineering, Feng Chia University , 100 Wenhwa Road, Taichung 40724, Taiwan.
authors.forename: Ho-Chin
authors.initials: HC
authors.lastname: Wu
authors.affiliation: Department of Chemical Engineering, Feng Chia University , 100 Wenhwa Road, Taichung 40724, Taiwan.
authors.forename: Chong-Yi
authors.initials: CY
authors.lastname: Chang
authors.affiliation: Department of Chemical Engineering, Feng Chia University , 100 Wenhwa Road, Taichung 40724, Taiwan.
authors.forename: Wen-Hong
authors.initials: WH
authors.lastname: Huang
authors.affiliation: Shaoxing Pushkang Biotechnology Co., Ltd. , 398 Mahuan Road, Binhai New Area, Shaoxing, Zhejiang Province 312366, People's Republic of China.
authors.forename: Yi-Feng
authors.initials: YF
authors.lastname: Yang