Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7233749 | Biosensors and Bioelectronics | 2013 | 7 Pages |
Abstract
The detection of measles-specific primary antibodies (IgG) using electrochemical impedimetric immunosensors is reported. The optimum conditions for electrode saturation were reached after 40 min for 1 μg mlâ1 antibody concentrations. Surface roughness using AFM increased with each immobilization or antigen-antibody reaction step clearly confirming the surface modification and recognition between antigen and antibody. The human serum (HS) and new-born calf serum (NCS) spiked with antigen-specific antibody were studied to mimic the real sample analysis. The HS and NCS sera containing antibodies due to measles exhibited correlation between the increasing antibody serum concentrations and the charge-transfer resistance (electrochemically measured). This work clearly showed the potential use of impedance as the preferred electrochemical method for detecting measles-antibodies in label-free manner.
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Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Philani Mashazi, Phumlani Tetyana, Sibulelo Vilakazi, Tebello Nyokong,