Tell me about the anorexia and acid difference of the ph meter
PH meter/acidity meter is a commonly used instrument and equipment, which is mainly used to precisely measure the pH value of liquid medium. It can also measure the MV value of ion electrode potential with the corresponding ion selective electrode. It is widely used in industry, agriculture, scientific research, and environmental protection. And other fields. During the experimental use of the pH meter, sometimes there will be a certain amount of "tolerance" and "acid difference", so what are "tolerance" and "acid difference"? What is their cause? "Sodium difference" --- When measuring a solution with a high pH or a large Na+ concentration, the measured pH value is low, which is called "sodium difference" or "alkaline difference". The glass film of each pH electrode has a high limit for measuring pH. When this high limit is exceeded, the "sodium difference" will appear. The reason for the "sodium difference" is that sodium ions participate in the response. "Acid difference" --- When measuring strong acid with pH less than 1, or high salinity, or some non-aqueous solution, the measured pH value is too high, which is called "acid difference". The reason for the "acid difference" of the basic pH meter is: when measuring a solution with high acidity, the surface of the glass membrane of the pH electrode may adsorb acidic molecules; when measuring a high salinity or a non-aqueous solution, the aH+ in the solution becomes smaller .
