GB/T 43196-2023

This standard specifies the methodology for using scanning electron microscopy (SEM) to measure the particle size and shape distributions of nanomaterials. It is applied in research, quality control, and regulatory testing contexts where accurate characterization of nanoparticles is required, such as in the production of nano-powders, catalysts, and pharmaceutical excipients. The standard ensures consistent and comparable measurement results across laboratories for materials with dimensions typically between 1 nm and 100 nm.