What is ph meter electrode protection solution
A pH meter is an instrument used to measure the pH value of a solution. The pH meter works on the principle of a galvanic battery. The electromotive force between the two electrodes of the galvanic battery is based on Nernst's law, which is not only related to the properties of the electrode itself, but also related to the concentration of hydrogen ions in the solution. There is a corresponding relationship between the electromotive force of the primary battery and the concentration of hydrogen ions, and the negative logarithm of the concentration of hydrogen ions is the pH value. A pH meter is a common analytical instrument widely used in agriculture, environmental protection and industry.
The ph meter electrode protection solution is a liquid to protect the PH meter electrode, mainly composed of potassium chloride and preservatives. The electrodes used in the laboratory are all composite electrodes, which have the advantages of being convenient to use, not affected by oxidizing or reducing substances, and having a fast equilibrium speed. When in use, remove the rubber sleeve on the electrode filling port and the rubber sleeve at the lower end to maintain the hydraulic pressure difference of the potassium chloride solution in the electrode. The pH meter protection solution usually uses a saturated KCL solution, but it should be noted that some imported electrodes, such as Mettler-Toledo, Sartorius and Hach, use 3mol/L KCL, and the protection solution of some electrodes Need to bring silver ions, so you should read the instructions before preparing, confirm the condition of the electrolyte, and then choose how to prepare.
