Method and device for measuring trace matter in liquid by micro suspension arm sensor

A technology of micro-cantilever and sensor, which is used to measure trace substances in liquids. In the field of measuring trace substances in liquids, micro-cantilever sensors can solve the problems of small and disturbed nanomaterials and devices, and achieve the effect of rapid real-time water pollution detection.
CN1987416AInactive Publication Date: 2007-06-27ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2007-06-27
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The method includes steps: through channels, water pump drives samples of liquid to be tested and normal fluid into liquid pools respectively; placing micro cantilevers to liquid pools; using laser to hit reflection face, and using 2D photo detector to detect reflected light in order to know displacements of micro cantilevers; turning off, on channel of liquid to be detected, and turning on channel of normal fluid, when liquid to be detected passes, there will be fluctuation of micro cantilevers since sorption of matter in liquid, thus fluctuation of reflection of laser beam follows; position sensitive photo detector receives reflected laser signal; after calculation, magnification, and process, the method compares signal from the fluid to be tested with signal from normal fluid under same process mode so as to obtain information of ion density. By applying AFM technique to water contamination detection the invention measures content of ion in minute quantities in water in real time.
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Description

technical field

[0001] The invention relates to a method for measuring trace substances in liquids in the field of environmental detection, in particular to a method for measuring trace substances in liquids with a micro-cantilever sensor. Background technique

[0002] With the rapid economic development, environmental pollution is also increasing. The balance of the ecological environment is constantly being destroyed, which is threatening the survival of human beings and sustainable economic development. Therefore, strengthening the protection and construction of the ecological environment and promoting the sustained, rapid, coordinated and healthy development of the economy is one of the main tasks in the new era of our country. The quality of water is directly related to the health of the citizens of a country, and it is also one of the signs of a country's progress. The goal of our country's water use should gradually progress from "connecting tap water to every villag...

Claims

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