PRODUCTS

LIBS FOR MULTI-ELEMENTAL ANALYSIS

Schematic Diagram of LIBS setup built at Manipal University. It consists of Andor Mechelle ME5000 Spectrograph and Andor ICCD camera.

Left Image: Echelle spectrum of Hg Ar lamp covering a broad range from 250–800 nm.
Right Image: Intensity calibrated spectrum of Hg-Ar lamp

Left Image: (a) Hg-Ar spectrum recorded using Spectra-Pro 150 (b) Resolution on an expanded scale as inset.
Right Image: (a) Hg-Ar spectrum recorded using echelle spectrograph (b) Resolution on an expanded scale as inset.

Left Image: LIBS signal variation of copper plasma for different laser pulse intensities.
Right Image: Spatial distribution of laser ablated copper plasma.

Left Image: Gated copper spectrum of LIBS plasma as a function of time after plasma initiation.
Right Image: LIBS spectra recorded from copper and soil samples.

Left Image: Comparison of LIBS copper and soil spectra at region of our interest.
Right Image: LIBS spectrum of 400ppm copper in soil. Inset shows zoomed 521.82 nm line of copper.

LIBS Soil sample analysis — figure (a) spectrum obtained subtracting soil blank from soil with 400ppm copper (521.82 nm line of copper is shown inset), (b) spectrum of soil with 400ppm copper and (c) blank soil spectrum.
This work was carried out at Manipal University.