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Title: Determination of elemental composition of shale rocks by laser induced breakdown spectroscopy

Journal Article · · Spectrochimica Acta. Part B, Atomic Spectroscopy
 [1];  [2];  [3];  [2];  [4];  [3]
  1. Mississippi State Univ., Mississippi State, MS (United States). Inst. for Clean Energy Technology
  2. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
  3. Applied Spectra, Inc., Fremont, CA (United States)
  4. National Energy Technology Lab. (NETL), Morgantown, WV (United States)

Laser induced breakdown spectroscopy (LIBS) is used for elemental characterization of outcrop samples from the Marcellus Shale. Powdered samples were pressed to form pellets and used for LIBS analysis. Partial least squares regression (PLS-R) and univariate calibration curves were used for quantification of analytes. The matrix effect is substantially reduced using the partial least squares calibration method. Predicted results with LIBS are compared to ICP-OES results for Si, Al, Ti, Mg, and Ca. As for C, its results are compared to those obtained by a carbon analyzer. Relative errors of the LIBS measurements are in the range of 1.7 to 12.6%. The limits of detection (LODs) obtained for Si, Al, Ti, Mg and Ca are 60.9, 33.0, 15.6, 4.2 and 0.03 ppm, respectively. An LOD of 0.4 wt.% was obtained for carbon. Finally, this study shows that the LIBS method can provide a rapid analysis of shale samples and can potentially benefit depleted gas shale carbon storage research.

Research Organization:
National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
Sponsoring Organization:
USDOE
OSTI ID:
1480827
Alternate ID(s):
OSTI ID: 1359838
Journal Information:
Spectrochimica Acta. Part B, Atomic Spectroscopy, Vol. 122; ISSN 0584-8547
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (3)

Determination of Heating Value of Estonian Oil Shale by Laser-Induced Breakdown Spectroscopy journal January 2018
A fast variable selection method for quantitative analysis of soils using laser-induced breakdown spectroscopy journal January 2017
Real-Time Analysis of Potassium in Infant Formula Powder by Data-Driven Laser-Induced Breakdown Spectroscopy journal July 2018

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