The excitation signal generation circuit and electrochemical detection device of chronoamperometry and cyclic voltammetry based on arduino

Abstract

The present invention provides an excitation signal generation circuit and an electrochemical detection device based on Arduino to realize time-current method and cyclic voltammetry. The electrochemical detection device includes an excitation signal generation circuit, a three-electrode system circuit, a test electrode, a signal measurement circuit and The power signal circuit; the excitation signal generation circuit generates an excitation signal through the received Arduino digital signal; the three-electrode system circuit generates a constant voltage signal or a triangular wave voltage signal between the working electrode and the reference electrode of the test electrode through the excitation signal; the signal The measurement circuit converts the collected polarization currents in the working electrode and the counter electrode circuit of the test electrode into digital signals and feeds them back to the Arduino. The detection performance of the present invention is excellent, the cost is one percent of a commercial electrochemical device, and the volume and mass are one sixth, providing a low-cost, portable and wearable electrochemical monitoring device new fixtures.

Description

technical field [0001] The invention belongs to the field of electrochemical detection, and in particular relates to an excitation signal generating circuit and an electrochemical detection device based on Arduino to realize time current method and cyclic voltammetry. Background technique [0002] In recent years, the development of novel electrochemical sensing and biosensing systems has attracted great attention due to the wide range of applications of these systems in fields such as healthcare, environmental monitoring, and defense. The low-cost, portable electrochemical detector can provide another world for disease diagnosis and food industry, agriculture and environmental monitoring, and provide new fields for advanced medical treatment, wearable medical testing equipment, advanced agricultural environmental testing and quality control. way. [0003] At present, the development of such testing in the fields of production, experiment, scientific research, use, and main...

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Problems solved by technology

And the design of some electrochemical detectors is based on Arduino or the evolutionary version of Arduino, among them (P.Joshi, S.D.S, and R.A.S, "Development Of ACyclic Voltammetry System By Designing a Low Cost," Int.J.Curr.Res, vol. 9, pp.51072-51075, 05 / 312017.), (H.Shamkhalichenar and J.-W.Choi, "An inkjet-printed non-enzymatic hydrogen peroxide sensor on paper," J Electrochem.Soc., vol.164 , no.5, pp.B3101-B3106, 2017.), (A.Nemiroski et al.,"Universal mobile electrochemical detector designed for use in resource-limited applications,"P.Natl.Acad.Sci.,vol.111, no.33, pp.11984-11989, 2014.), (C.Loncaric, Y.Tang, C.Ho, M.A.Parameswaran, and H.-Z.Yu,"A USB-based electrochemical biosensor prototype for point-of -care diagnosis,"Sensor.Actuat.B-Chem.,vol.161,no.1,pp.908-913,2012.) is not completely open source, only part of their design is open source, for researchers in interdisciplinary fields However, it is also very difficult to realize this type of design; some of these documents only give experimental results, but the experimental results are not compared with commercial electrochemical detection equipment, which reduces the credibility of the experimental results; and (A .Ainla et al., "Open-Source Potentiostat for Wireless Electrochemical Detection with Smartphones," Anal.Chem., vol.90, pp.6240-6246, 2018.), although the design of its hardware and software is open source, and the experimental The results are compared with existing commercial electrochemical detection equipment, but it adopts RFDUINO as microcontroller, RFDUINO is a combination of Arduino and bluetooth module Combined, it is developed for wireless scene applications, and its price is ten times that of ordinary Arduino, so this design is suitable for wireless scenes, and the price is expensive; in addition, (Meloni and G.N., "Building a Microcontroller Based Potentiostat: A Inexpensive and Versatile Platform for Teaching Electrochemistry and Instrumentation,"J.Chem.Educ.,vol.93,pp.1320-1322,2016.), (L.Y.C.et al.,"An Easily Fabricated Low-Cost Potentiostat Coupled with User-Friendly Software for Introducing Students to Electrochemical Reactions and Electroanalytical Techniques, "J.Chem.Educ., vol.95, pp.1658-1661, 2018.), although its hardware and software design is open source, it uses the pulse width modulation (PWM, Pulse-WidthModulation) generated inside Arduino ) wave to realize the DAC function, but there is no DAC (Digital to Analog Converter) chip inside Arduino, so it is natural to use PWM wave to realize the DAC function, but in the design of electrochemical detection equipment with Arduino as the core, PWM is used to realize Whether the DAC function meets the requirements has not been compared in the literature. Secondly, their experimental results have not been compared with commercial electrochemical detection equipment, so the accuracy of the experimental results may also be reduced.

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