Electrode-modified microfluidic detection chip for heavy metal ions and preparation method of detection chip

Abstract

An embodiment of the invention provides an electrode-modified microfluidic detection chip for heavy metal ions. The detection chip includes a microfluidic module and a three-electrode sensor, whereinthe microfluidic module is integrally formed by 3D printing, and the interior of the microfluidic module has a microchannel and a sensor insertion groove; the three-electrode sensor includes three electrodes printed on a card-shaped base plate, wherein a working electrode is a bare carbon electrode modified by porous nano-NiMn2O4; and the three-electrode sensor is inserted into the sensor insertion groove matched with the three-electrode sensor to form the microfluidic detection chip. The bare carbon working electrode modified by the NiMn2O4 porous nanomaterial has little increase in impedanceand maintains good reversibility, the detection chip using the working electrode has better linear response to lead and cadmium, so that the detection sensitivity to trace lead and cadmium is significantly improved, the detection limit is as low as half of that of a chip using an original bare carbon working electrode, and the detection performance of the microfluidic detection chip is enhanced.The embodiment of the invention also provides a preparation method of the microfluidic detection chip.

Description

technical field [0001] The invention belongs to the technical field of electrochemical detection, in particular to an electrode-modified heavy metal ion microfluidic detection chip. The invention also provides a preparation method of the microfluidic chip. Background technique [0002] With the development of Internet industrialization and industrial intelligence, the number of electronic and electrical products has grown explosively. While enjoying the new life style brought by modern science and technology and e-commerce, human beings are also facing the increasing impact of a large amount of electronic waste on the living environment. Threat of growth. Heavy metals are one of the most important pollutants in e-waste, and they are widely found in electrical and electronic products. If the raw materials, products or wastes are not well controlled, heavy metals will directly enter the soil, water and atmosphere, causing direct pollution and causing serious pollution. Indir...

AI Technical Summary

Problems solved by technology

Traditional ASV uses a rod-shaped three-electrode system for measurement in a beaker. The detection process requires a large amount of sample solution, takes a long time for pre-electrolysis, and the reproducibility of the detection results is poor. It is inconvenient to be used as a solution for on-site rapid detection

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