ABSTRACT
By applying methods used by microscopists to the preparation of samples for infrared microspectroscopy, one can analyze particles less than 1 ng in size. For example, a dispersion of particles too small to analyze individually can be trans ferred to a KBr crystal and assembled to cover a larger area. Excellent spectra can be obtained for an array of 1-to 2-|mm particles by careful sample prepa ration. Techniques for solving similar problems have been carefully documented in this chapter. These techniques require practice and proper tools. These tech niques are extremely useful in isolating and identifying contaminants encoun tered in the pharmaceuticals, electronics, forensics, and manufacturing industries.
