pH online detection device and detection method based on absorption spectrum of acid-base indicator

Abstract

The invention discloses a pH online detection device and detection method based on the absorption spectrum of an acid-base indicator, wherein the detection device includes a pipeline through which the liquid to be tested can flow, and a detection chip fixed in the pipeline is correspondingly arranged on the side of the pipeline A light source, a photodetector, and an alarm circuit electrically connected to the photodetector; the detection chip includes a polymer forming a three-dimensional structure and acid-base indicator molecules embedded in the polymer. The invention allows the liquid to be tested to pass through the pipeline provided with the detection chip, so that the liquid can be detected in real time and on-line, and the pH deviation from the normal value can be found at the first time, so as to control the damage caused by pollution to the greatest extent. In addition, by selecting the acid-base indicator, the liquid to be tested can be detected in a larger 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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