What are the official methods of moisture content determination

Official Methods of Moisture Content Determination

Moisture content determination is a crucial process in various industries, including agriculture, construction, and food manufacturing. By utilizing official methods, accurate and reliable results can be obtained. Here are the official methods commonly employed:

1. Oven Drying

  • Samples are weighed and heated in an oven at a specific temperature and time.
  • The loss in weight after drying represents the moisture content.

2. Karl Fischer Titration

  • Samples are dissolved in a solvent and titrated with Karl Fischer reagent.
  • The endpoint indicates the presence of moisture in the sample.

3. Microwave Drying

  • Samples are exposed to microwave radiation, which evaporates moisture.
  • The change in weight before and after exposure indicates the moisture content.

4. Calcium Hydride Method

  • Samples are reacted with calcium hydride, which releases hydrogen gas.
  • The volume of hydrogen gas generated is proportional to the moisture content.

5. Vacuum Oven Drying

  • Samples are placed in a vacuum oven, which reduces pressure and removes moisture.
  • The loss in weight is indicative of the moisture content.

These official methods provide standardized and accurate means of determining moisture content, ensuring reliable results for various applications.