What are the official methods of moisture content determination?

Transmission Electron Microscopy (TEM) is an advanced technique employed to determine the moisture content of materials by examining their ultrastructure at the nanoscale.

Principle and Procedure:

• A sample of the material is prepared by creating an ultra-thin section.
• The section is placed on a grid and exposed to an electron beam.
• The electron beam interacts with the sample, transmitting electrons through the material.
• The transmitted electrons are detected and analyzed to produce an image of the sample’s structure.
• The moisture content is determined by measuring the contrast difference between the water-filled regions and the non-water-filled regions in the sample.

Advantages of TEM Method:

• High resolution imaging, enabling visualization of fine details in the sample.
• Quantitative analysis of moisture content, providing precise measurements.
• Ability to study the distribution of moisture within the sample.

Applications:

• Materials science: Characterizing the moisture content and distribution in polymers, ceramics, and metals.
• Environmental science: Determining the moisture content of soils and sediments.
• Biological science: Investigating the water content and ultrastructure of cells and tissues.

Conclusion:

Transmission Electron Microscopy (TEM) is an official method of moisture content determination that utilizes electron microscopy to provide high-resolution images and quantitative analysis. This technique is valuable for studying moisture content at the nanoscale and has applications in various scientific fields.