Operation method and working principle of Heng Aode's new multi-parameter water quality analyzer
DCS-8600 multi-parameter water quality analyzer is suitable for 1. Water source monitoring, environmental monitoring station, municipal water treatment process, municipal pipe network water quality supervision, rural tap water monitoring; 2. Suitable for circulating cooling water, swimming pool water operation management, industrial water source Recycling, factory aquaculture
Trial scope of new water quality detector
In order to protect the water environment, monitoring of sewage discharge must be strengthened. The design of the inspection points and the quality of the instrumentation (mainly multi-parameter water quality analyzers) play a crucial role in the monitoring of the water environment. The chemical and physical methods are used to determine the content of various chemical components in water. The multi-parameter water quality analyzer is divided into three types: simple analysis, full analysis and special analysis. The analysis is carried out in the field, with few analytical projects, but the requirements are fast and timely. The project for the preliminary analysis of the main chemical composition of groundwater in aquifers over a large area depends on the needs of specific tasks. Another multi-parameter water quality analyzer can quickly and accurately determine qualitative and quantitative analysis, and can be fully automated, intelligent, real-time online, multi-parameter simultaneous analysis, and the results and print the report.
Water is the source of life. Human beings are inseparable from water in their daily life and production activities. The quality of drinking water is closely related to human health. With the development of social economy, scientific progress and the improvement of people's living standards, people's water quality requirements for drinking water have been continuously improved, and drinking water quality standards have been continuously developed and improved accordingly. As the development of drinking water quality standards is related to people's living habits, culture, economic conditions, scientific and technological development level, water resources and water quality status, not only between countries, but also between different regions of the same country. There are differences in the requirements for drinking water quality
use
Drinking water mainly considers the impact on human health. In addition to physical and chemical indicators, the water quality standards also include microbiological indicators. For industrial water, it is considered whether it affects product quality or is prone to damage to containers and pipelines. Can be widely used in power plants, pure water plants, water plants, domestic sewage treatment plants, beverage plants, environmental protection departments, industrial water, aquaculture, textile industry, wine industry and pharmaceutical industry, epidemic prevention departments, hospitals and other departments of the ions Parameter determination.
working principle
The multi-parameter water quality analyzer mainly uses ion-selective electrode measurement to achieve accurate detection. Electrodes on the instrument: pH, fluorine, sodium, potassium, calcium, magnesium, and reference electrodes. Each electrode has an ion-selective membrane that reacts with the corresponding ions in the sample being tested. The membrane is an ion exchanger that reacts with the ionic charge to change the membrane potential, and the potential between the sample and the membrane can be detected. . The two potential differences detected on both sides of the film generate current, and the sample, reference electrode, reference electrode liquid constitutes the "loop" side, the membrane, the internal electrode liquid, and the internal electrode are the other side.
The difference in ion concentration between the internal electrode solution and the sample produces an electrochemical voltage across the membrane of the working electrode. The voltage is directed to the amplifier through the highly conductive internal electrode, and the reference electrode is also directed to the location of the amplifier. A calibration curve is obtained by detecting a standard solution of a known known ion concentration to detect the ion concentration in the sample.
When the ion to be measured contacts the electrode in the solution, ion migration occurs in the aquifer of the ion selective electrode substrate. There is a potential change in the charge change of the migrated ions, thereby changing the potential between the membrane faces, and a potential difference is generated between the measuring electrode and the reference electrode.
Method of operation
1. The instrument is booted into the system self-test to detect whether the functions of the main components are normal, such as: instrument main board, printer, liquid path detection (completed by liquid checker), distribution valve and valve checker, etc., which can intelligently identify and judge faults. Automatic prompt.
2. Enter the activation electrode program, with electrode activation timing function, accurately grasp the activation time to improve the electrode life and ensure electrode stability. The time is 30 minutes countdown, you can press the NO button to exit the activation electrode program directly.
3. Enter the main menu, first perform electrode calibration, and ensure the stability of the instrument by calibration.
4. Select the water sample analysis. After more than 5 quality control tests, the quality control report can be automatically generated and printed, and the average value, standard deviation and coefficient of variation of the quality control times can be calculated.
5. Intelligent liquid detection program ensures accurate injection and measurement, automatic measurement process, convenient guide, 24-hour standby, automatic maintenance in standby mode, automatic positive and negative flushing function, short liquid path, exclusive Positive and negative flushing automatically calibrates and flushes the piping system to prevent cross-contamination. 6. Automatic printing, manual printing optional, saving paper. Report Form: Comprehensive information report, which can set the reference range value and print.
7. Adopting the imported compact power pump tube from the United States to increase the service life of the pump tube.
8. Measurement method: ion selective electrode (ISE) direct method.
9. Test items: PH, fluoride ion, nitrate nitrogen, water hardness (Ca 2 + , Mg 2 + ion), chloride ion, sodium ion, potassium ion, calcium ion, etc.
Precautions
The use environment must meet the working conditions
Non-professional maintenance engineers, do not open the instrument for repair.
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