基于机器学习的低浓度多巴胺快速电化学检测方法研究

doi:10.3969/j.issn.0258-8021.2022.04.008

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Abstract Portable potentiostat is facing the problem that the accuracy is low and vulnerable under the test conditions. This paper proposed an electrochemical detection data analysis method by combining nanomaterial modified electrodes and machine learning. Under the presence of multiple experimental interference factors, this method was able to achieve the accurate detection of dopamine (DA). The AuNPs/GCE electrode was prepared by electrodepositing gold nanoparticles on the surface of glassy carbon electrode (GCE) by chronoamperometry, and the electrocatalytic activity for the redox of dopamine of AuNPs/GCE was verified by cyclic voltammetry (CV). Under the different solution pH values and scanning speeds, the AuNPs/GCE electrode was applied to perform repetitive accurate cyclic voltammetric detection of dopamine solutions of different concentrations. After the extraction of important characteristics including the peak height, peak potential, baseline slope, peak area and initial redox potential of the detection data, the extreme gradient boosting tree model (XGBoost) and the random forest model (RF) were applied to construct a two-stage concentration prediction analysis. The results showed that the MAE, RMSE and MAPE% of XGBoost-RF concentration prediction model were reduced to 53.9%, 39.7% and 2.7% respectively compared with the traditional SVR model. The training time of RF prediction model was reduced by 23%, the prediction accuracy was improved by 7%, and the fitting degree (R-squared) between predicted value and experimental value was 0.943. In conclusion, this method effectively reduced the influence of different experimental factors in the detection process. It Also improved the detection accuracy and reduced the complexity of the experiment. Therefore, it is of great significance to realize the on-site and rapid electrochemical detection of microscale element.

Key words： dopamine detection nano-modified electrode machine learning method two-stage model electrochemical detection under multiple interfering factors

Received: 21 February 2022

PACS:

R318

Corresponding Authors: ^*E-mail: xuyingxy@hdu.edu.cn

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	Articles by authors
	Liu Zhe
	Sun Lesheng
	Yu Jun
	Lu Ning
	Xu Ying
	Guo Miao

Cite this article:

Liu Zhe,Sun Lesheng,Yu Jun, et al. A Rapid Electrochemical Detection Method of Low-Concentration Dopamine Based on Machine Learning[J]. Chinese Journal of Biomedical Engineering, 2022, 41(4): 452-461.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2022.04.008 OR http://cjbme.csbme.org/EN/Y2022/V41/I4/452

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