Abstract：This paper introduced a portable potentiostat platform based on AVR microcontroller, which was used for electrochemical detection of trace vitamin B2. The platform adopted the high-precise conversion chip AD7705 and DAC8831 and used a microcontroller ATmega16 as a controlling core. The integrated operational amplifier was designed by OPA211 as the core device. The software design adopted optimized calibration logic. Therefore, the potentiostat output was effectively controlled, and the functions of setting the potentiostatic and measuring the polarization current parameter were implemented. Testing results showed that the potentiostat potential error was controlled within the millivolt, the maximum error was about 1%, and the test current limit value was less than 1 μA. The stability and sensitivity of the portable potentiostat platform was also analyzed compared with the CHI660C electrochemical instrument. The linearity between the peak current and the concentration of vitamin B2 was measured by the platform experiment, and the correlation coefficient was 0.994. The rapid detection of vitamin B2 in food was preliminarily verified.
徐 莹, 罗玉林, 郭 淼. 检测微量维生素B2的便携式恒电位仪平台设计[J]. 中国生物医学工程学报, 2017, 36(2): 187-194.
Xu Ying, Luo Yulin, Guo Miao. Design of the Portable Potentiostat for the Detection of Trace Level of Vitamin B2. Chinese Journal of Biomedical Engineering, 2017, 36(2): 187-194.
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