Review on Ph Meter

Review on Ph Meter

Author Name : Ms. Komal Naikude, Ms. Tai Yele, Ms. Jyoti Jawale, Ms. Damini Rathod, Ms. Vaishnavi Patale

ABSTRACT

A pH Meter is an electrical instrument used to measure ph.Using this device, you can determine the pH of a solution or the amount of hydrogen ions present in an aqueous solution or the number of active hydrogen atoms, ions present in a liquid solution. It is possible to gauge a solution's acidity or basicity using the pH scale. The pH scale has range from 0 to14.A solution with a pH of 7 is neutral; one with a pH of less than 7 is acidic. A solution is basic if its pH is higher than 7. To determine the pH of water, solutions, and environmental samples, Ph meters are frequently employed. The course of reactions in many chemical and biological processes can be understood with the aid of accurate pH value results. The pH meters are typically set for three buffers with pH values closer to 7.0, 9.2, and 4.0. The measurements will be precise because linearity has been verified in this range. Control knobs are offered to normalize the meter with pH buffers if there is any drift. The meter may not be able to be adjusted to the pH buffers' theoretical values using the control knobs due to meter or electrode ageing, though. In such cases, it is essential to obtain reliable readings that are not impacted by meter drift. For a few adjustments to the process are suggested as a result, and the laboratories can still keep the correctness of the outcomes. The suggested method for monitoring pH levels in the field is can be followed firmly without worrying about the meter's state. The negative logarithm of the concentration of hydrogen ions is known as PH. In contrast to conventional methods, which simply provide an indicator of pH, a digital pH meter provides a numerical pH value with greater accuracy, that the mixture is acidic or basic. It is simple to keep the solution at a neutral pH level because it provides a precise pH number. Furthermore, it offers accuracy up to 0.01%. In this study,we used a magnetic stirrer or mixer that rotates the magnetic field to agitate the solution while monitoring the hydrogen ion concentration.

The procedure of calibrating pH meter involves measuring liquids with a known pH level. This is necessary to account for the fact that electrode's properties will change over time. Validation is the process of periodically measuring a buffer solution and comparing the reading to the expected reading (which is normally provided with the buffer solution). This is done to ensure the buffer solution's accuracy.

Keywords: pH, pH electrode, pH buffer, pH meter, pH measurement, pH error, pH accuracy, aging of pH meter, pH meter drift, electrochemistry.