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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: G38–G47

Quantitative analysis of gallstones using laser-induced breakdown spectroscopy

Vivek K. Singh, Vinita Singh, Awadhesh K. Rai, Surya N. Thakur, Pradeep K. Rai, and Jagdish P. Singh  »View Author Affiliations


Applied Optics, Vol. 47, Issue 31, pp. G38-G47 (2008)
http://dx.doi.org/10.1364/AO.47.000G38


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Abstract

The utility of laser-induced breakdown spectroscopy (LIBS) for categorizing different types of gallbladder stone has been demonstrated by analyzing their major and minor constituents. LIBS spectra of three types of gallstone have been recorded in the 200 900 nm spectral region. Calcium is found to be the major element in all types of gallbladder stone. The spectrophotometric method has been used to classify the stones. A calibration-free LIBS method has been used for the quantitative analysis of metal elements, and the results have been compared with those obtained from inductively coupled plasma atomic emission spectroscopy (ICP-AES) measurements. The single-shot LIBS spectra from different points on the cross section (in steps of 0.5 mm from one end to the other) of gallstones have also been recorded to study the variation of constituents from the center to the surface. The presence of different metal elements and their possible role in gallstone formation is discussed.

© 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
(300.0300) Spectroscopy : Spectroscopy
(300.2140) Spectroscopy : Emission
(300.6210) Spectroscopy : Spectroscopy, atomic
(350.5400) Other areas of optics : Plasmas

History
Original Manuscript: April 2, 2008
Revised Manuscript: July 4, 2008
Manuscript Accepted: July 7, 2008
Published: August 13, 2008

Citation
Vivek K. Singh, Vinita Singh, Awadhesh K. Rai, Surya N. Thakur, Pradeep K. Rai, and Jagdish P. Singh, "Quantitative analysis of gallstones using laser-induced breakdown spectroscopy," Appl. Opt. 47, G38-G47 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-31-G38

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