LIBS Info: Element Analysis

Title Authors Material Detector Spectrometer Software
Determination of thorium and uranium in solution by laser-induced breakdown spectrometry N/A Actinides Spectrolaser 1000 Spectrolaser 1000 Spectrolaser
Laser: Nd:YAG
Gate Delay: 0.600us
Gate Width: Noneus
A novel method whereby solutions are applied to filter paper and then dried before analysis is described. The process leads to a significant concentration enhancement.
Element Detection Limit (ppm) Wavelength (nm) Other Wavelengths (nm) Calibration Method Calibration Range (ppm) Notes
U 18.5000 (Stated) 367.0070 409.013 Calibration Curve None-5000.0000 A Detection limit of 24.6ppm (weight) was determined using the 409.013nm peak. Note that there is strong interference from Th I 366.998nm and the Th band of peaks in the 405-425nm regions.
Th 0.7200 (Stated) 401.9130 283.729, 318.019 Calibration Curve None-1000.0000 Detection limits for 283.729nm (1.6ppmw) and 318.019nm (2.25ppmw) were also determined. Th can be determined in the presence of U as the 401.913nm line is free from U interferences

Element RMSE (ppm) Wavelength (nm) Calibration Method Notes