1.1 These practices provide general recommendations covering the various techniques commonly used in obtaining internal reflection spectra.²^,³ Discussion is limited to the infrared region of the electromagnetic spectrum and includes a summary of fundamental theory, a description of parameters that determine the results obtained, instrumentation most widely used, practical guidelines for sampling and obtaining useful spectra, and interpretation features specific for internal reflection.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.