Online PH detection device and method based on absorption spectrum of acid-base indicator

Abstract

The invention discloses an online pH detection device and method based on an absorption spectrum of an acid-base indicator. The detection device comprises a pipeline, a detection chip, a light source, a photoelectric detector and a warning circuit, wherein to-be-detected liquid can flow through the pipeline, the detection chip is fixed in the pipeline, the light source and the photoelectric detector are correspondingly arranged at the side parts of the pipeline, and the warning circuit is electrically connected with the photoelectric detector; the detection chip comprises polymers and acid-base indicator molecules, the polymers form a three-dimensional structure, and the acid-base indicator molecules are embedded into the polymers. According to the online pH detection device, the liquid can be detected online in a real time when the to-be-detected liquid flows through the pipeline provided with the detection chip, and a phenomenon that the pH deviates from a normal value can be immediately found, so that the damage caused by the pollution is maximally controlled; besides, by selecting the acid-base indicator, the to-be-detected liquid can be detected within a wide pH range.

Description

technical field [0001] The invention belongs to measuring instruments, in particular to an on-line monitoring and alarming device for detecting the pH value of industrial waste water and other fluids. Background technique [0002] The measurement of pH is closely related to the fields of modern industry, agriculture, medicine, bioengineering, environment, and scientific research. Therefore, pH sensors are currently attracting attention, and pH measurement in industrial wastewater is currently a relatively significant demand. [0003] For pH measurement, the traditional technology uses the calibration of the indicator in the solution, the change of the color of the indicator for testing, or the use of a pH meter for measurement. However, these methods all adopt the method of sampling to measure the pH value of the solution. The pH detection of industrial wastewater that changes at any time is relatively lagging behind, and cannot reflect the changes in the acidity and alkalin...

AI Technical Summary

Problems solved by technology

However, these methods all adopt the method of sampling to measure the pH value of the solution. The pH detection of industrial wastewater that changes at any time is relatively lagging behind, and cannot reflect the changes in the acidity and alkalinity of the solution in real time. As a result, when the pH value deviates from normal, the pollution Has already occurred, the damage caused by pollution cannot be controlled in the first place

[0004] In blood pH monitoring, some instruments detect the pH value through the chemiluminescence reaction between the protein in the blood and the reaction membrane, but the scope of use of this equipment is very small, and it can only be used to detect the pH of the liquid containing protein value, and the production cost is high, and the sensitivity degrades quickly

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