What are the official methods of moisture content determination?

The moisture content of a material is the amount of water present in the material as a percentage of the total weight of the material. The official methods of moisture content determination include:

• Oven drying: The material is heated in an oven at a specific temperature until it reaches a constant weight. The difference in weight between the original material and the dried material is the moisture content.
• Karl Fischer Titration: A reagent that reacts with water is added to a sample of the material. The amount of reagent required to reach the endpoint of the reaction is proportional to the moisture content of the material.
• Microwave oven drying: The material is heated in a microwave oven until it reaches a constant weight. The difference in weight between the original material and the dried material is the moisture content.

The choice of method depends on the specific material and the desired accuracy of the measurement.