The coulometric method is one of the **official methods of moisture content determination.** It is a highly accurate and versatile technique that can be used to determine the moisture content of a wide variety of materials, including soils, foods, and pharmaceuticals.

Principle of Operation

The coulometric method is based on the principle of electrolysis. A sample of the material to be tested is placed in an electrolytic cell, and a known amount of electrical current is passed through the cell. The water in the sample is electrolyzed, and the amount of current required to complete the electrolysis is proportional to the moisture content of the sample.

Advantages of the Coulometric Method

• High accuracy
• Versatility
• Can be used to determine the moisture content of a wide variety of materials
• Relatively simple to operate

Disadvantages of the Coulometric Method

• Can be time-consuming
• Requires specialized equipment

Applications of the Coulometric Method

The coulometric method is used in a wide variety of applications, including:

• Soil moisture determination
• Food moisture determination
• Pharmaceutical moisture determination
• Paper moisture determination