Label-free amperometric immunosensor based on prussian blue as artificial peroxidase for the detection of methamphetamine.
Label-free amperometric immunosensor based on prussian blue as artificial peroxidase for the detection of methamphetamine.
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DOI：
10.1016/j.aca.2013.11.019
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发表时间：
2014-01
影响因子：
6.2
通讯作者：
Ling-yan Zhang;Yan-jun Liu
中科院分区：
文献类型：
--
作者：
Ling-yan Zhang;Yan-jun Liu
A label-free amperometric immunosensor for the detection of methamphetamine was developed. The prussian blue deposited/l-cystine-modified electrode was covered with nano-Au/(3-mercaptorpropyl) trime-thoxysilane film. Then, the nano-Au was used for the immunosensor platform to capture a large amount of anti-methamphetamine. PB exhibited excellent electrocatalytical properties toward the reduction of H2O2at low overpotentia to amplify the amperometric signal, which enhanced the sensitivity of the immunosensor. The active sites of PB could be shielded and the access of H2O2from solution to the electrode might be partially blocked after the completion of immunoassay, led to a linear decrease in the response current of the electrode over the range from 1.0 × 10−8to 5.0 × 10−6mol L−1of MA. The obtained immunosensor displayed excellent catalytic reduction toward H2O2due to high activity and selectivity of PB. The influence of relevant experimental variables, including the construction of immunosensor platform, the amount of MPS and the time of immunoaction, was examined and optimized.
