[X-ray microanalysis--possibilities and methods].

The quality of X-ray microanalytical results in biology and medicine depends primarily on the preparation techniques used. Modern preparative methods for the X-ray microanalysis of both nondiffusible and diffusible elements are reviewed. It is demonstrated that native results can be obtained if a few conditions in the preparation are fulfilled. Technical requirements for the preparation are shown to be comparable to or even less restrictive than those needed in conventional electron microscopy.