Digital microfluidic chip system and method for determination of heavy metal ions in water

Abstract

The invention relates to the field of digital microfluidic chip technology and environmental monitoring, in particular to a digital microfluidic chip system and method for measuring heavy metal ions in water, the system includes a digital microfluidic chip for measuring heavy metal ions in water and a Digital microfluidic chip peripheral equipment for water heavy metal determination; the digital microfluidic chip includes a planar structure, which is divided into a work area, a pin area and an I / O interface, wherein the work area includes a droplet functional area and a detection area; The foot area is provided with pins connecting the chip, the droplet drive circuit and the power supply; the I / O interface is connected with the sensor circuit for measuring the position of the droplet. The digital microfluidic chip system reduces equipment cost, greatly saves chemical reagents, significantly improves reaction speed, and reduces test cost and time-consuming. The process does not require mechanical components such as pumps, valves and pipelines, the system is more stable, and the droplet control is more precise and reliable.

Description

technical field [0001] The invention relates to the field of digital microfluidic chip technology and environmental monitoring, in particular to a digital microfluidic chip system and method for measuring heavy metal ions in water. Background technique [0002] With the development of industry and agriculture, more and more heavy metals such as mercury, cadmium, chromium, lead, copper, zinc, nickel, barium, vanadium, etc. Concentration into the biological chain, posing a serious threat to the entire ecological environment. In order to achieve the sustainable utilization of water resources and the unification of the three major benefits of society, economy and ecology, heavy metal detection research has become the most important content in water environment research projects. [0003] At present, high-precision atomic absorption spectroscopy and atomic fluorescence spectroscopy can be used for heavy metal detection, but the instruments used in these methods are often bulky, ...

AI Technical Summary

Problems solved by technology

[0003] At present, heavy metal detection can use high-precision atomic absorption spectroscopy and atomic fluorescence spectroscopy, but the instruments used in these methods are often bulky, low-throughput, expensive, cumbersome to operate, and require more professional technicians

For spectrophotometry with relatively low instrument prices, its pretreatment is mainly based on wet chemical chromogenic reaction, and masking agents need to be added to mask interfering ions. The operation is cumbersome, and the process often takes up 90% of the entire analysis time.

At the same time, it needs to consume a lot of chemical reagents, the test cost is high, and it is not conducive to environmental protection

Although the newly developed heavy metal detection system based on continuous microfluidic chips has been improved in terms of miniaturization, automation, integration and portability, it requires mechanical components such as pumps, valves and pipelines during its operation, and there are many incidental hardware. Complex system, poor fault tolerance and stability

[0004] The above situations are far from meeting the information requirements of a laboratory in the computer age, let alone adapting to the long-term and continuous monitoring process in the harsh on-site analysis environment

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