PH Measurement Principle

The pH value of the material indicates how many hydrogen ions (H +) are formed in a certain measured volume of water. The pH meter shows how acidic or alkaline liquids are. The basic principle of the pH meter is to measure the density of hydrogen ions. Positively charged hydrogen ions (H +) are formed when acids are soluble in water. The stronger acid is measured by the higher accumulation of hydrogen ions. The bases or alkaline materials dissolve in water and form negatively charged hydrogen ions (OH-). High concentrations of negatively charged hydrogen ions form a stronger base. Many hydrogen ions are present in the solution dissolved in water and determine the pH value. The pH of the solutions is between 1 and 14. PH 1 solutions are highly acidic and solutions with pH 14 are very basic. The pH meter is used to determine the pH of different drugs.

The pH meter is made from a pH meter that passes electrical signals to the meter and the meter shows the pH of the solution. The glass probe contains two electrodes, one reference electrode and one sensor electrode, which are in the form of glass tubes. One saturated potassium chloride solution contains the other pH 7 buffer. The sensor electrode bulb interpolates the permeable or porous glass membrane with metallic salts and silicon dioxide coating. The silver wire coated with silver chloride is immersed in the bulbous pH buffer. Another silver-coated silver wire falls into the saturated potassium chloride solution.

When the probe is in a liquid solution, Hydrogen (H +) ions accumulate around the bulb instead of the metal ion from the lamp. There are ion exchanges that generate electricity that is fastened by silver wire. The pH meter computes the voltage of the electric current by comparing the generated voltage with the reference electrode. High voltage occurs when greater accumulation due to acidification of the solution or density of hydrogen ions. Reading in one meter decreases due to increased voltage.

Similarly, hydrogen ions will also decrease if the increase in alkalinity increases. In other words, the increase in the hydroxyl concentration decreases the voltage and increases the pH in the meter.

Functional principle of pH meter and pH-sensor all-inclusive Replacement of ions from sample solution to pH 7 buffer (internal solution) to glass electrode via glass membrane. Continuous use of the glass surface reduces the porosity of the glass, thereby reducing the performance and efficiency of the probe.

For accurate pH measurements: For accurate measurements, the pH Meters must be subjected to appropriate calibration by blending into buffers using the pH-value test solution Meter. The measurement itself can be corrected by calibrating the pH meter and performing the measurements by roughly the same measurements


Source by Ankur Choudhary

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