DETERMINATION OF CESIUM, MANGANESE AND TERBIUM BY INTRACAVITY LASER SPECTROSCOPY

The statistical characteristics of the intracavity laser spectrometer are investigated by analysis of cesium in aqueous solutions. The error distribution of measurements is normal. The relative standard deviati on of the analysis in the middle of the dynamic range is equal to 9.7% . The intracavity spectral analysis was carried out at low contents of cesium: manganese and terbium in aqueous solutions. The limits of det ection are: 5 mu g l(-1) (Cs), 20 mu g l(-1) (Mn) and 1000 mu g l(-1) (Tb). Owing to the high spectral resolution of the spectrometer used t he hyperfine structure of the thallium absorption line (535.05 nm) was recorded.