Infrared Spectra of Submicrogram Quantities of Materials.
Abstract
A study was made to determine practical and theoretical sensitivity limits of infrared spectroscopy for selected phosphonate acid esters. An infrared Fourier transform spectrophotometer was used in the study with both a triglycine sulfate and cooled mercury-cadmium telluride detector. The most sensitive technique should be the micro-KBr disc technique, but volatility of the sample reduced the effectiveness of this method. Where small samples able to be prepared, subnanogram sensitivity is possible using small apertures and a cooled detector. Practically the most convenient method for submicrogram sampling of the materials used in this study was found to be in carbon tetrachloride solution. The use of rapid-scanning Fourier transform spectroscopy was studied for identification of peaks eluted from a gas-chromatograph. This technique works for large samples, but not for submicrogram amounts. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1972
- Accession Number
- AD0894449
Entities
People
- Peter R. Griffiths