MA Ying-ming,BAO Yu,LIU Zhen-bang,NIU Li.Development of a Multichannel Portable Electrochemical Measurement Device[J].Journal of Instrumental Analysis,2025,44(09):1951-1958.
MA Ying-ming,BAO Yu,LIU Zhen-bang,NIU Li.Development of a Multichannel Portable Electrochemical Measurement Device[J].Journal of Instrumental Analysis,2025,44(09):1951-1958. DOI: 10.12452/j.fxcsxb.25061005.
Development of a Multichannel Portable Electrochemical Measurement Device
This paper has developed a miniature multi-channel portable electrochemical measurement device,which can realize real-time online content detection of multi-component substances in human sweat. This device has the advantages of multi-channel,low cost and portability,and can simultaneously perform two-channel current-time curve and three-channel open-circuit potential-time curve tests. The paper elaborates on the design idea of the device and the issues that need attention in the design of miniaturized electrochemical measurement devices.This device can obtain four different gains by adjusting the Current-to-Voltage Converter(
I
-
V
) resistor,with a current measurement range of 10 pA-100 μA,an applied potential range of ±1.25 V,an applied potential accuracy of less than 1 mV,an open-circuit potential measurement range of ±1.25 V,and a potential resolution of up to 0.1 mV,which meets the online detection needs of most screen-printed electrodes. The output accuracy of the excitation signal and the sampling accuracy of the analog signal of the circuit have been tested and verified .Solid-state potassium ion-selective electrodes were prepared using GC/rGO-MoO₃ and rGO synthesized by members of the research group as transduction layers to measure the open-circuit potential function,and glucose and lactic acid sensors were fabricated to verify the current-time curve test effect of the device. At the same time,the device was used to actually verify the changes in the content of sweat components(glucose,lactate,K
+
,Na
+
,pH value) during human exercise. The results show that the miniature multi-channel portable electrochemical measurement device not only reaches the practical level in technical parameters,but also its successful application in sensor adaptability and actual detection of human sweat fully proves its great potential in the field of real-time monitoring of physiological indicators,providing a solid
technical support for the subsequent development of more advanced wearable health monitoring equipment and the promotion of personalized health management.
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