Ionic liquids-doped organic-inorganic hybrid film for electrochemical immunoassay for hepatitis B surface antigen |
| |
Authors: | Xiaohong Fu Lan Pu Jinyue Wang and Zhaoyang Zhong |
| |
Institution: | (1) School of Chemistry and Chemical Engineering, Yibin University, Yibin, 644000, People’s Republic of China;(2) Department of Cancer Center, Daping Hospital, Third Military Medical University, Chongqing, 400042, People’s Republic of China |
| |
Abstract: | A new mediator-free amperometric immunoassay for hepatitis B surface antigen (HBsAg) in human serum was designed by means
of immobilizing horseradish peroxidase-hepatitis B surface antibodies conjugates (HRP-HBsAb) on ionic liquids-doped organic-inorganic
hybrid film. The composite film including magnetic nanogold particles and nanoalumina particles provides a friendly microenvironment
for the immobilization of biomolecules. The presence of ionic liquids enhances the electron communication between the immobilized
biomolecules and the base electrode and improves the sensitivity of the electrochemical immunoassay. With a non-competitive
immunoassay format, the formation of the immunocomplex between the immobilized HRP-HBsAb and HBsAg in sample solution exhibited
a barrier of direct electrical communication between the immobilized HRP and the base electrode and changed the bioelectrocatalytic
properties of the immobilized HRP towards H2O2 in the detection solution. Under optimal conditions, the developed immunosensors displayed a good current response in a dynamic
range from 1.2 to 430 ng/mL with a limit of detection of 0.3 ng/mL HBsAg (at 3s). The proposed immunosensors have good precision, high sensitivity, acceptable stability, and reproducibility and could be
used for the HBsAg detection in human serum with consistent results in comparison with those obtained by the enzyme-linked
immunosorbent assay method. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|