检测微量维生素B<sub>2</sub>的便携式恒电位仪平台设计

doi:10.3969/j.issn.0258-8021. 2017. 02.009

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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.

Key words： rapid electrochemical measurement portable potentiostat avr microcontroller vitamin B₂ detection

Received: 05 April 2016

PACS:

R318

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	Articles by authors
	Xu Ying
	Luo Yulin
	Guo Miao

Cite this article:

Xu Ying,Luo Yulin,Guo Miao. Design of the Portable Potentiostat for the Detection of Trace Level of Vitamin B₂[J]. Chinese Journal of Biomedical Engineering, 2017, 36(2): 187-194.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021. 2017. 02.009 OR http://cjbme.csbme.org/EN/Y2017/V36/I2/187

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