The Joint Industry Standard (JIS) Methods are standardized test methods that are widely accepted and used in the industry.
Which equipment is used for moisture testing?
- Karl Fischer Titration
- Loss on Drying
- Microwave Moisture Analyzers
- Calcium Hydride
The selection of equipment for moisture testing depends on various factors, such as the type of material being tested, the required accuracy, and the available resources.
Karl Fischer Titration
Karl Fischer Titration is a volumetric technique that is used to determine the water content of a sample. This method involves the reaction of water with Karl Fischer reagent, which contains iodine, sulfur dioxide, and a base, to form iodine and water. The iodine is then titrated with a standardized solution of sodium thiosulfate to determine the water content.
Loss on Drying
Loss on Drying is a gravimetric technique that is used to determine the moisture content of a sample. This method involves heating the sample at a specified temperature until it reaches a constant weight. The weight loss during heating is attributed to the loss of moisture from the sample.
Microwave Moisture Analyzers
Microwave Moisture Analyzers use microwaves to heat the sample and determine the moisture content. This method is rapid and can be used to analyze a wide variety of materials. The microwaves cause the water in the sample to evaporate, and the weight loss is used to determine the moisture content.
Calcium Hydride
Calcium Hydride is a chemical that is used to absorb moisture from a sample. This method involves placing the sample in a container with calcium hydride and weighing the container before and after the reaction. The weight gain is attributed to the absorption of moisture by the calcium hydride.