Feasibility of Quantitative UV Resonance Raman Spectroscopy with a KrF Excimer Laser

Abstract

The feasibility of quantitative resonance Raman spectroscopy with a KrF excimer laser providing primary radiation at 249 nm has been examined. The instrumentation is described, and results are reported for measurements with a photomultiplier detector and scanning monochromator. Considerations affecting the success of the internal standardization are described. A least-squares fitting procedure is employed for quantifying the overlapped analyte and internal standard spectral lines. Instrumental detection limits of 2.2, 1.2, and 1.0 mg/L are reported for anthracene, 9-methylanthracene, and 2-methylanthracene, respectively, for spectra obtained with 120 laser pulses per step. Detection limits in the low ppb range are projected for a system employing an intensified diode array detector.