New Electrochemical Sensor Based on a Silver-Doped Iron Oxide Nanocomposite Coupled with Polyaniline and Its Sensing Application for Picomolar-Level Detection of Uric Acid in Human Blood and Urine Samples

2018 ◽  
Vol 122 (12) ◽  
pp. 3037-3046 ◽  
Author(s):  
Sathish Kumar Ponnaiah ◽  
Prakash Periakaruppan ◽  
Balakumar Vellaichamy
2012 ◽  
Vol 26 (11) ◽  
pp. 1308-1314 ◽  
Author(s):  
Ana Mornar ◽  
Miranda Sertić ◽  
Nikša Turk ◽  
Biljana Nigović ◽  
Mirko Koršić

2019 ◽  
Vol 15 (2) ◽  
pp. 166-171 ◽  
Author(s):  
Ali Samadzadeh ◽  
Iran Sheikhshoaie ◽  
Hassan Karimi-Maleh

Background: Simultaneous analysis of epinephrine and tyrosine as two effective and important biological compounds in human blood and urine samples are very important for the investigation of human health. Objective: In this research, a highly effective voltammetric sensor fabricated for simultaneous analysis of epinephrine and tyrosine. The sensor was fabricated by the modification of glassy carbon electrode with ZnO-Pt/CNTs nanocomposite (ZnO-Pt/CNTs/GCE). The synthesized nanocomposite was characterized by SEM method. The ZnO-Pt/CNTs/GCE showed two separated oxidation signals at potential ~220 mV and 700 mV for epinephrine and tyrosine, respectively. Also, we detected linear dynamic ranges 0.5-250.0 µM and 1.0-220 µM with a limit of detections 0.1 µM and 0.5 µM for the determination of epinephrine and tyrosine, respectively. The ZnO-Pt/CNTs/GCE was used for the determination of epinephrine and tyrosine in blood serum and human urine samples.


RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14330-14332 ◽  
Author(s):  
Hongje Jang ◽  
Dal-Hee Min

A highly precise glucose sensor was developed based on plasmon peak shift induced by the glucose oxidase mediated etching of Au–Ag nanoparticles. The platform enabled quantitative glucose detection in human blood and urine samples.


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