Integrated microfluidic electrochemical sensor chip for rapid BOD detection, and preparation method and BOD detection method thereof

A sensor chip and electrochemical technology, applied in chemical instruments and methods, laboratory containers, electrochemical variables of materials, etc., can solve problems such as inability to realize continuous online monitoring of BOD, large volume, and limited efficiency of microbial degradation of organic matter
CN111474218AActive Publication Date: 2020-07-31BEIJING INFORMATION SCI & TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INFORMATION SCI & TECH UNIV
Publication Date
2020-07-31

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Abstract

The invention provides an integrated microfluidic electrochemical sensor chip for rapid BOD detection, and a preparation method and a BOD detection method thereof, and relates to the technical field of BOD detection. The chip comprises: a monocrystalline silicon substrate; a PDMS layer superposed inside the surface of the monocrystalline silicon substrate and provided with a microfluidic channel system, wherein the microfluidic channel system comprises a to-be-detected liquid inlet, a microfluidic channel, a biofilm reactor, an electrochemical detection pool and a waste liquid outlet; a three-electrode system arranged between the monocrystalline silicon substrate and the PDMS layer and arranged in an interdigital ultramicro electrode array; and a platinum film temperature sensor arranged on the bottom surface of the monocrystalline silicon substrate, wherein a micro heating copper electrode is adhered to the surface of the platinum film temperature sensor. Effective integration of twofunctional units of the biofilm reactor and the electrochemical electrode is realized on the same chip by adopting a microfluidic technology, and miniaturization of the sensor and rapid, stable, accurate and continuous automatic monitoring of the BOD of the water sample are realized.
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Description

technical field

[0001] The invention relates to the technical field of biochemical oxygen demand detection, in particular to an integrated microfluidic electrochemical sensor chip for rapid detection of BOD, its preparation and a BOD detection method. Background technique

[0002] Biochemical oxygen demand (also known as BOD) is a comprehensive index indicating the content of aerobic pollutants such as organic matter in water. It shows the total amount of dissolved oxygen consumed in the process of oxidative decomposition of organic matter in water due to the biochemical action of microorganisms. Its unit Expressed in mg / L, the higher the value, the more organic pollutants in the water and the more serious the pollution. The determination of BOD is to simulate the biodegradation and aerobic biochemical treatment process of natural water bodies. It is the main means to evaluate the biochemical treatment of sewage, and it is also a must-test item for water quality evaluation. ...

Claims

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