LIBS Info: Element Analysis

Title Authors Material Detector Spectrometer Software
Preliminary studies of laser-induced breakdown spectrometry for the determination of Ba, Cd, Cr and Pb in toys Quienly Godoi, Dário Santos Júnior, Lidiane Cristina Nunes, Flavio O. Leme, Iolanda Aparecida Rufini, Jose A.M. Agnelli, Lilian Cristina Trevizan, Francisco José Krug Plastic Kodak KAF 1001 ESA 3000 MATLAB
Laser: Nd:YAG
Gate Delay: 1.000us
Gate Width: 6.000us
In this paper, heavy metal contaminants in plastic toys are measured. Measurements were performed Argon at 1litre/min. Doehlert experimental design (using peak areas for Ba, Cd, Cr and Pb as the criteria to maximise) was used to optimise number of laser pulses, integration time gate, delay time and laser energy. Worryingly, heavy metals were found in all the samples, and in paint on another toy.
Element Detection Limit (ppm) Wavelength (nm) Other Wavelengths (nm) Calibration Method Calibration Range (ppm) Notes
Pb 547.0000 (Minimum Concentration Detected) 220.3530 N/A Univariate -10.0000--10.0000 Direct analysis of plastic (toy)
Ba 311.0000 (Minimum Concentration Detected) 233.5270 N/A Univariate -10.0000--10.0000 Direct measurement on plastic (toy).
Cd 61.0000 (Minimum Concentration Detected) 214.4410 N/A Univariate -10.0000--10.0000 Direct measurement on plastic (toy).
Cr 90.3000 (Minimum Concentration Detected) 284.3260 N/A Univariate -10.0000--10.0000 Direct measurement on plastic (toy)

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