Abstract:
Laser-Induced Breakdown Spectroscopy (LIBS) is an analytical technique for classification and
quntification of target materials. It uses different optics, target holder, vacuum chamber and Charge
Coupled Device (CCD)/ICCD camera to take the fingureprint of the target material. When a laser
is focused onto a target material, it emits a plasma radiation that comprises of electrons, neutral and
ionic emission at different time scale.
So, in this project work the literature review supported by NIST spectral analysis is used toquantify
forensic science for the analysis of trace evidences collected from the scene of occurrence was expl
ained using LIBS analytical technique.This work focus on the materials like DNA, alloys of elemen
ts, Gunshoot Residue (GSR), glass, paint, soil, fingerprint, counterfeit currency,variation in the man
ufacture of chemical composition and allows considerable discrimination even with very small
remains emission spectra.
The main parameters of plasmas radiation are electron density and electron temperature from the
quantified spectra in the papers. Then, using this analytical parameter, the NIST spectra are plotted
to show the fingerprints of the materials to be analyzed for forensic purpose. Finally, analytical prob
lem facing for a forensic expert and techniques employed to challenge them and the future perspecti
ves of the technique are presented