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Rapid analysis of alpha-fetoprotein by chemiluminescence microfluidic immunoassay system based on super-paramagnetic
Hui Huang1, Xiao Lin Zheng, Jun Song Zheng
1Department of Clinical Laboratory Science, Third Military Medical University, Chongqing, 400038, China.
Abstract:
A rapid and sensitive chemiluminescence microfluidic immunoassay system based on super-paramagnetic microbeads for determination of alpha-fetoprotein (AFP) is described. In this system we use CO(2) laser to fabricate microfluidic chip, and use super-paramagnetic microbeads as solid carrier of antibody, chemiluminescence as detection signal. With this system we can perform AFP analysis within 20 min, and the linear range of AFP concentration is 1 approximately 800 ng/mL, the detection limit is 0.23 ng/mL. By this method no separation or preconcentration steps are needed. Most of all, the chip can be reused.

