Contaminant concentration in environmental samples using LIBS and CF-LIBS |
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| Authors: | S Pandhija N K Rai A K Rai S N Thakur |
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| Institution: | (1) Laser Spectroscopy Research Laboratory, Department of Physics, University of Allahabad, Allahabad, 211002, India;(2) Department of Nephrology, Opal Hospital, N. 10/60, Kakarmatta, DLW Road, Varanasi, India, 221010;(3) Present address: School of Applied Physics and Mathematics, Shri Mata Vaisho Devi University, Kakryal, Reasi, 182320, India |
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| Abstract: | The present paper deals with the detection and quantification of toxic heavy metals like Cd, Co, Pb, Zn, Cr, etc. in environmental
samples by using the technique of laser-induced breakdown spectroscopy (LIBS) and calibration-free LIBS (CF-LIBS). A MATLABTM program has been developed based on the CF-LIBS algorithm given by earlier workers and concentrations of pollutants present
in industrial area soil have been determined. LIBS spectra of a number of certified reference soil samples with varying concentrations
of toxic elements (Cd, Zn) have been recorded to obtain calibration curves. The concentrations of Cd and Zn in soil samples
from the Jajmau area, Kanpur (India) have been determined by using these calibration curves and also by the CF-LIBS approach.
Our results clearly demonstrate that the combination of LIBS and CF-LIBS is very useful for the study of pollutants in the
environment. Some of the results have also been found to be in good agreement with those of ICP-OES. |
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