The McCreery Research Group

Items of Possible Interest to Web Users

Raman Shift Frequency Standards
ASTM has established a series of Raman shift frequency standards (ASTM E 1840) for use in the calibrating of Raman spectrometers. Raman shift standards are easier to use than wavelength standards (such as atomic emission lines) and do not depend on laser wavelength. Standard Raman shifts for eight materials are included in the standard. The standard spectra have been made available on this page.

Raman Intensity Standards
A Raman intensity standard is also under development. The standard has three objectives.
  1. Correction of instrumental response function
  2. Daily performance checks on a given instrument
  3. Comparison of signal and signal-to-noise for various samples on different instruments

    4. The principles and procedure for response function correction are published in Ray & McCreery, Applied Spectroscopy 51, 108-116 (1997). Commercial standards are not yet available, but possible sources are being investigated with NIST. The ASTM Raman subcommittee is discussing the approach as a possible ASTM standard.