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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 9 — Mar. 20, 2011
  • pp: 1227–1233

Quantitative analysis of toxic metals lead and cadmium in water jet by laser-induced breakdown spectroscopy

M. Sadegh Cheri and S. H. Tavassoli  »View Author Affiliations


Applied Optics, Vol. 50, Issue 9, pp. 1227-1233 (2011)
http://dx.doi.org/10.1364/AO.50.001227


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Abstract

Laser-induced breakdown spectroscopy (LIBS) has been applied to the analysis of toxic metals Pb and Cd in Pb ( NO 3 ) 2 and Cd ( NO 3 ) 2 . 4 H 2 O aqueous solutions, respectively. The plasma is generated by focusing a nanosecond Nd:YAG ( λ = 1064 nm ) laser on the surface of liquid in the homemade liquid jet configuration. With an assumption of local thermodynamic equilibrium (LTE), calibration curves of Pb and Cd were obtained at different delay times between 1 to 5 μ s . The temporal behavior of limit of detections (LOD) was investigated and it is shown that the minimum LODs for Pb and Cd are 4 and 68 parts in 10 6 (ppm), respectively. In order to demonstrate the correctness of the LTE assumption, plasma parameters including plasma temperature and electron density are evaluated, and it is shown that the LTE condition is satisfied at all delay times.

© 2011 Optical Society of America

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(300.6365) Spectroscopy : Spectroscopy, laser induced breakdown

ToC Category:
Spectroscopy

History
Original Manuscript: July 21, 2010
Revised Manuscript: January 11, 2011
Manuscript Accepted: January 14, 2011
Published: March 14, 2011

Citation
M. Sadegh Cheri and S. H. Tavassoli, "Quantitative analysis of toxic metals lead and cadmium in water jet by laser-induced breakdown spectroscopy," Appl. Opt. 50, 1227-1233 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-9-1227

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