An electrochemical biosensor based on multi-wall carbon nanotube–modified screen-printed electrode immobilized by uricase for the detection of salivary uric acid

被引:0
作者
Weishan Shi
Jing Li
Jie Wu
Qianying Wei
Cuili Chen
Ning Bao
Chunmei Yu
Haiying Gu
机构
[1] Nantong University,School of Public Health
来源
Analytical and Bioanalytical Chemistry | 2020年 / 412卷
关键词
Carbon nanotubes; Uric acid; Human saliva; Biosensor; Chronoamperometry;
D O I
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学科分类号
摘要
The amounts of uric acid (UA) in non-invasive biological samples, such as saliva, are critical for diagnosis and therapy of gout, hyperuricemia, Lesch–Nyhan syndrome, and several other diseases. Here, disposable UA biosensors were fabricated with the screen printing technique on the substrate of flexible PET. The working electrode was modified with carbon nanotubes followed by uricase for UA detection with excellent selectivity. The biosensor showed good electrocatalytic activity toward UA with high sensitivity, low detection limit, and wide linear range, which covers the full range of UA levels in human saliva. We demonstrate that UA can be directly detected in human saliva with the biosensor and the experimental data were consistent with the clinical analysis. This study indicated that the non-invasive biosensor is an attractive and possible approach for the monitoring of salivary UA.
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页码:7275 / 7283
页数:8
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