PNNL

Abstract

The National Institute of Standards and Technology (NIST) and the Pacific Northwest National Laboratory (PNNL) are each creating quantitative databases containing the vapor-phase infrared spectra of pure chemicals. The digital databases have been created with both laboratory and remote-sensing applications in mind. A spectral resolution of ˜0.1 cm-1 was selected to avoid degrading sharp spectral features, while also realizing that atmospheric broadening typically limits line widths to 0.1 cm-1. Calculated positional (wave number, cm-1) uncertainty is =0.005 cm-1, while the 1s statistical uncertainty in absorbance values is