PRELIMINARY EVALUATION OF THE KERR EFFECT PHASE SHIFT AS A TECHNIQUE FOR CHEMICAL ANALYSIS
Abstract
Several optical techniques are of interest as possible approaches to the chemical analysis of fuels and lubricants. Of these techniques, measurement of the phase shift or time lag in the Kerr effect was chosen for initial investigation. A breadboard device was constructed to measure the phase shift at frequencies from 200 Hz to 100 kHz. This device was used to measure the critical frequencies of poly-gamma-benzyl-01-glutamate (1500 Hz), Acryloid HF-866 (1900 Hz), a probable impurity in lubricant ester S-9 (1000 Hz), and lubricant ester S-7 (>5 kHz), and also to analyze quantitatively a mixture of Acryloid HF-866 and the impure ester S-9. A spectrometer of simpler construction than the current instrument was designed to facilitate extending the measurments to higher frequencies on the order of 1 MHz, so that a wider range of molecular sizes and structures can be investigated. Also, the equations describing the Kerr response curve of mixtures were derived. Some numerical tests of the simple analysis procedures were compared with the results of these equations, and intensity and derivative spectra for representative mixtures were obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1970
- Accession Number
- AD0704896
Entities
People
- Eugene T. Krasicki
- John R. Rowlands
- Robert E. Linder
Organizations
- Southwest Research Institute