Company Profile

Global Marketing

Certification

History

News & Information

What is pH, and what should you know about pH measurement?

What is pH, and what should you know about pH measurement?

When an acid is added to water, the acidity of the water increases and the pH value decreases. When a base is added to water, the alkalinity of the water increases, and the pH is the unit used to express the degree of acidity or alkalinity. When we say that milk is “cool” or that an acid is “weak,” we are not providing a definitive description of the condition of the substance, because we have not specified the measurement unit or the measured value. By contrast, stating that the temperature of the milk is 10°C conveys a precise concept. Similarly, saying that a weak acid has a pH of 5.2 also constitutes a precise statement.

19 Dec,2024

View Details
Basic Principles of Electrodes

Basic Principles of Electrodes

The electrodes used in potentiometric analysis are referred to as galvanic cells. A galvanic cell is a system that converts chemical reaction energy into electrical energy. The voltage of such a cell is known as the electromotive force (EMF). This EMF is composed of two half-cells: one is the measuring electrode, whose potential is related to the activity of a specific ion; the other is the reference half-cell, commonly called the reference electrode, which is typically in contact with the solution being measured and connected to the measuring instrument.

28 Jul,2022

View Details
Components of a Complete Conductivity Measurement System

Components of a Complete Conductivity Measurement System

A complete conductivity measurement system comprises an inductive or conductive measuring electrode, a cable, and a measuring instrument. Unlike pH electrodes, conductive electrodes are made from materials with stable mechanical properties, so they do not require special protective components. When selecting a conductive electrode, the following considerations should be taken into account:

12 Nov,2021

View Details
How is the polarization resistance Rp formed?

How is the polarization resistance Rp formed?

Ions serve as charge carriers, transporting charge to the electrode surface. When the electrode surface is too small or the ion concentration is too high, this charge-transfer process cannot proceed rapidly, leading to the formation of an ion cloud at the electrode surface that obscures the electrode. In the case of direct current, the initial current gradually decreases to zero. However, since conductivity measurements are performed using alternating current, only a finite additional resistance is introduced—though this resistance is, of course, undesirable.

12 Nov,2021

View Details
< 1 >