The official methods of moisture content determination using Scanning Electron Microscopy (SEM) are extensively employed to assess the moisture content of a wide range of materials, including soil, food products, industrial materials, and pharmaceuticals. SEM offers a detailed analysis of the microstructure and surface morphology of the sample, providing insights into the distribution of moisture within the material.

The method involves capturing high-resolution images of the sample using an electron beam. These images reveal the physical characteristics of the material, including the presence and distribution of moisture. The moisture content is determined by analyzing the contrast variations in the images, which arise due to the different electron scattering properties of water and the other components of the material.

The SEM method is characterized by its high resolution and the ability to provide quantitative data on the moisture content. It is particularly useful for analyzing small samples, and for materials where traditional moisture measurement techniques are not suitable. The method’s precision and accuracy make it a reliable tool for various applications, including quality control, research, and development.