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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 31 — Nov. 1, 2008
  • pp: G105–G111

Detection sensitivity of laser-induced breakdown spectroscopy for Cr II in liquid samples

Nilesh K. Rai, Awadhesh K. Rai, Akshaya Kumar, and Surya N. Thakur  »View Author Affiliations


Applied Optics, Vol. 47, Issue 31, pp. G105-G111 (2008)
http://dx.doi.org/10.1364/AO.47.00G105


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Abstract

The performance of laser-induced breakdown spectroscopy (LIBS) has been evaluated for detection of toxic metals such as Cr in water. Pure aqueous solutions (unitary matrix) with variable Cr concentration were used to construct calibration curves and to estimate the LIBS limit of detection (LOD). The calibration curves for Cr in a binary matrix (Cr plus Cd) and a tertiary matrix (Cr plus Cd and Co) were used to evaluate the matrix effect on the LOD. The LOD for Cr was found to be 1.1, 1.5, and 2.0 ppm (parts in 10 6 ) in a unitary, binary, and tertiary matrix, respectively. Once calibrated, the system was utilized for the detection and quantification of the Cr in tannery wastewater collected from different locations in the industrial area of Kanpur, India, where Cr concentrations were determined to be far higher than the U.S. Environmental Protection Agency safe drinking water limit of 0.05 ppm .

© 2008 Optical Society of America

OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(140.3440) Lasers and laser optics : Laser-induced breakdown
(300.2140) Spectroscopy : Emission
(300.6360) Spectroscopy : Spectroscopy, laser
(350.5400) Other areas of optics : Plasmas

History
Original Manuscript: March 31, 2008
Revised Manuscript: July 18, 2008
Manuscript Accepted: July 23, 2008
Published: September 10, 2008

Citation
Nilesh K. Rai, Awadhesh K. Rai, Akshaya Kumar, and Surya N. Thakur, "Detection sensitivity of laser-induced breakdown spectroscopy for Cr II in liquid samples," Appl. Opt. 47, G105-G111 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-31-G105

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