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Electrode modified heavy metal ion microfluidic detection chip and preparation method

A heavy metal ion and electrode modification technology, applied in the field of electrochemical detection, can solve the problems of poor reproducibility of detection results, inconvenient on-site rapid detection, large demand for sample solution, etc., and achieves enhanced detection performance of heavy metal ions, good linear response, The effect of improving detection sensitivity

Active Publication Date: 2020-09-11
JIANGSU YANGTZE TESTING & CERTIFICATION CO LTD +1
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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

Method used

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  • Electrode modified heavy metal ion microfluidic detection chip and preparation method
  • Electrode modified heavy metal ion microfluidic detection chip and preparation method
  • Electrode modified heavy metal ion microfluidic detection chip and preparation method

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Embodiment Construction

[0043] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0044] The present invention aims at the technical problem that the detection performance of the microfluidic chip used for the detection of ASV heavy metal ions in the prior art needs to be further improved. This embodiment provides the following figure 1 The shown electrode-modified heavy metal ion microfluidic detection chip, the microfluidic detection chip includes Figure 2 to Figure 4 The microfluidic module 1 and the three-electrode sensor 2 that match each other are shown in the following specific structures:

[0045] Such as figure 2 As shown, the microfluidic module 1 contains a microchannel 10 inside, and the two ends of the microchannel 10 are provided with an inlet pipe 12 and an outlet pipe 13 communicating with the outside; The sensor s...

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Abstract

An embodiment of the present invention provides an electrode-modified heavy metal ion microfluidic detection chip, including a microfluidic module and a three-electrode sensor, wherein: the microfluidic module is integrally formed by 3D printing, and has a microchannel and a sensor slot inside; The three-electrode sensor consists of three electrodes printed on a card-shaped bottom plate, in which the working electrode is porous nano-NiMn 2 o 4 A modified bare carbon electrode; inserting a three-electrode sensor into a matching sensor slot to form the microfluidic detection chip. NiMn 2 o 4 The bare carbon working electrode modified by porous nanomaterials has little increase in impedance and maintains good reversibility. The detection chip using this working electrode has a better linear response to lead and cadmium, which significantly improves the detection of trace amounts of lead and cadmium. Sensitivity, the detection limit is as low as half of the original bare carbon working electrode, which enhances the detection performance of the microfluidic detection chip. The embodiment of the present 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/00G01N27/30G01N27/48
CPCB01L3/502707G01N27/308G01N27/48G01N27/30B01L3/502715B01L2300/0877B01L2300/0816B01L2300/0645B33Y80/00B33Y10/00B33Y40/20B29C64/112B29C64/30B33Y70/00B01L2300/16B29L2031/752B41M1/12B41M1/30B41M3/006G01N27/333
Inventor 洪颖刘佳封亚辉高玲唐晨张跃王金陵安伟万其露陈建松
Owner JIANGSU YANGTZE TESTING & CERTIFICATION CO LTD
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