Hengaode Instrument Multi parameter Water Quality Analyzer Nitrate and Chloride Ion Detector Working Principle and Operation Method

working principle

The multi parameter water quality analyzer mainly uses ion selective electrode measurement method to achieve accurate detection. Electrodes on the instrument:PHFluorine, 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 changes the membrane potential by reacting with the ion charge, allowing for the detection of the potential between the liquid, sample, and membrane. The two potential differences detected on both sides of the membrane will generate current. The sample, reference electrode, and reference electrode liquid form a "circuit". On one side, the membrane,Internal electrode liquid, with the internal electrode on the other side.

The difference in ion concentration between the internal electrode solution and the sample will generate electrochemical voltage on both sides of the membrane of the working electrode. The voltage is led to the amplifier through the highly conductive internal electrode, and the reference electrode is also led to the location of the amplifier. By detecting a precise standard solution with known ion concentration, a calibration curve can be obtained to determine the ion concentration in the sample.

When the measured ions in the solution come into contact with the electrode, ion migration occurs within the aquifer of the ion selective electrode substrate. The change in charge of migrating ions results in a potential change, causing a change in the potential between the membrane surfaces and creating a potential difference between the measuring electrode and the reference electrode

Operation Method

1When the instrument is turned on, it enters the system self-test to check whether the functions of each main component are normal, such as the instrument motherboard, printer, liquid circuit detection (completed by the liquid detector), distribution valve and valve detector, etc. It can intelligently identify and judge faults and automatically prompt.

2Entering the activation electrode program, it has the function of electrode activation timing, accurately grasping the activation time to improve the service life of the electrode and ensure electrode stability. The time is30Minute countdown, can be pressedNOPress the key to exit the activation electrode program directly.

3Enter the main menu, perform electrode calibration on the first line, and ensure instrument stability through calibration.

4Select water sample analysis, after5After more than one quality control test, a 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.

5Intelligent liquid detection program ensures accurate injection and measurement, with automatic prompts during the measurement process and convenient guidance for you24Hourly standby, capable of automatic maintenance in standby mode, with automatic forward and reverse flushing function, short liquid path, automatic calibration of forward and reverse flushing, and flushing of pipeline system to prevent cross contamination.6Automatic printing and manual printing are optional, saving printing paper. Report form: Comprehensive information report, which can set reference range values and print.

7Adopting a compressed power pump tube imported from the United States to increase the service life of the pump tube.

8Measurement method: ion selective electrode（ISE）Direct method.

9Testing items:PHFluoride ions, nitrate nitrogen, water hardness（Ca 2 +TheMg 2 +Projects such as ions, chloride ions, sodium ions, potassium ions, calcium ions, etc