This practice establishes the standard techniques that are of general use in securing and analyzing samples in microgram quantities (microanalysis) by infrared spectrophotometry. These techniques include general microspectroscopy, analysis of gas chromatographic fractions, analysis of liquid chromatographic fractions, analysis of thin-layer chromatographic fractions, analysis of paper chromatographic fractions, analysis of gases evolved from a thermogravimetric analyzer, and infrared spectroscopy using a microscope.

1.1 This practice covers techniques that are of general use in securing and analyzing microgram quantities of samples by infrared spectrophotometric techniques. This practice makes repetition of description of specific techniques unnecessary in individual infrared methods.

1.2 These recommendations are supplementary to Practices E 168, E 573, and E 1252, which should be referred to for theory, general techniques of sample preparation, and calculations.