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Measuring Total Soil Carbon with Laser-Induced Breakdown Spectroscopy (LIBS)

David A. Cremersa, Michael H. Ebinger*,b, David D. Breshearsb, Pat J. Unkeferc, Susan A. Kammerdienerb, Monty J. Ferrisa, Kathryn M. Catlettb and Joel R. Brownd

a Advanced Chemical Diagnostics and Instrumentation Group, MS J565
b Environmental Dynamics and Spatial Analysis Group, MS J495
c Bioscience Division, B-S1, MS E529, Los Alamos National Lab., Los Alamos, NM 87545
d USDA-NRCS Jornada Experimental Range, P.O. Box 30003, MSC 3JER, New Mexico State Univ., Las Cruces, NM 88003-8003



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  		Fig. 1. Diagram of laser-induced breakdown spectroscopy (LIBS) apparatus showing a LIBS spectrum of a soil tuned to monitor the carbon emission at 247.8 nm. To the right of the carbon line is a series of silicon lines used for quantification.

 


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  		Fig. 2. (A) Calibration curve for the detection of total soil carbon from Colorado Mollisols using laser-induced breakdown spectroscopy (LIBS). (B) Correlation between carbon concentration predicted by LIBS and determined by dry combustion for Colorado Mollisols and Los Alamos Alfisols. Line indicates exact correlation between LIBS and dry combustion measurements.

 




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