Preparation method of coating for marine metal ion detection system and electrochemical sensor based on microfluidics

Abstract

The invention relates to a microfluidic-based marine metal ion detection system and a preparation method of a coating of an electrochemical sensor, belongs to the field of sensor detection, and aims to quickly detect more than two marine metal ions, a metal ion separation system mainly comprises a high-voltage power supply and a metal ion separation microfluidic channel, receiving seawater collected by the metal ion sampling system, applying external voltage to the seawater in the channel, enabling the metal ions to rotate and accelerate in the separation micro-fluidic channel so as to separate interference ions from target ions in a time-sharing manner, separating the interference ions from the target ions in a time-sharing manner, enabling the interference ions to be separated from the channel in a time-sharing manner, and enabling the target ions to be enriched under the voltage, the device has the effects that ion separation and target ion enrichment of a low-concentration seawater sample are realized, and electrochemical detection and digital quantity output of the enriched ion concentration are realized under the control of the single chip microcomputer.

Description

technical field [0001] The invention belongs to the field of sensor detection, and relates to a microfluidic-based marine metal ion detection system and a method for preparing coatings for electrochemical sensors. Background technique [0002] The ocean is the cradle of life and one of the most important partners for human beings to survive. It provides humans with a series of resources such as mineral food, water, and wind energy. Metal ion pollution in the marine environment threatens the marine ecological environment. Metal ions (chromium ions Cr, copper ions Cu, cadmium ions Cd, mercury ions Hg, lead ions Pb, and cobalt ions Co, etc.) are quickly released into the marine environment along with the discharged sewage, directly affecting the quality of aquatic products in the ocean. Life and quality, serious harm to human health and living environment. [0003] The protection of the marine ecological environment and the sustainable development strategy have sounded the ala...

AI Technical Summary

Problems solved by technology

However, it also has certain limitations, for example, the peaks are easy to overlap during detection, the sensitivity is low, and the interference is serious

[0009] From the previous seawater detection research, it can be found that most of the detection methods are aimed at the detection of a certain metal ion in seawater samples, and there are few studies on the simultaneous detection of multiple ions, and most of the detection methods require certain samples. Pretreatment steps, and commonly used pretreatment methods such as attachment separation, complex extraction, ion exchange, etc. often require a lot of chemical reagents, the operation is cumbersome and complicated, which limits the professionalism of the testing personnel, the reproducibility is not good, and it is not easy to Automate analysis

Sensitive elements sensitive to metal ions have toxic hazards and are difficult to use

Most detection devices need to take seawater samples back to the laboratory for detection, which takes a long time and the detection effect is poor

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