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Journal of Spectroscopy
Volume 2016 (2016), Article ID 1835027, 7 pages
Research Article

Quantitative Classification of Quartz by Laser Induced Breakdown Spectroscopy in Conjunction with Discriminant Function Analysis

1Department of Applied Physics, Federal Urdu University of Arts, Science and Technology, Islamabad 44,000, Pakistan
2National Center for Physics, Quaid-i-Azam University Campus, Islamabad 44,000, Pakistan
3International College, UCAS, Beijing 100190, China

Received 9 July 2016; Accepted 31 October 2016

Academic Editor: Jau-Wern Chiou

Copyright © 2016 A. Ali et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A responsive laser induced breakdown spectroscopic system was developed and improved for utilizing it as a sensor for the classification of quartz samples on the basis of trace elements present in the acquired samples. Laser induced breakdown spectroscopy (LIBS) in conjunction with discriminant function analysis (DFA) was applied for the classification of five different types of quartz samples. The quartz plasmas were produced at ambient pressure using Nd:YAG laser at fundamental harmonic mode (1064 nm). We optimized the detection system by finding the suitable delay time of the laser excitation. This is the first study, where the developed technique (LIBS+DFA) was successfully employed to probe and confirm the elemental composition of quartz samples.