Quantitative analysis of slurry sample by laser-induced breakdown spectroscopy |
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Authors: | Krishna K Ayyalasomayajula Vivek Dikshit Fang Yu Yueh Jagdish P Singh Laura T Smith |
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Institution: | (1) Institute for Clean Energy Technology, Mississippi State University, Starkville, MS 39759, USA; |
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Abstract: | Laser-induced breakdown spectroscopy (LIBS) has been employed for the analysis of slurry samples. Quantitative analysis of
slurry samples is crucial and challenging. The problems associated with slurry samples include splashing, surface turbulence,
and the difficulties of obtaining reproducible samples due to sedimentation. The LIBS analysis has achieved limited success
due to inherent disadvantages when applied to slurry samples. In order to achieve improved measurement precision and accuracy,
a spin-on-glass sampling method was evaluated. Five elements (Al, Ca, Fe, Ni, and Si) were examined in five slurry simulants
containing varying amounts of each ion. Three calibration models were developed by using univariate calibration, multiple
linear regression, and partial least square regression. LIBS analysis results obtained from the partial least square regression
model were determined to be the best fit to results obtained from inductively coupled plasma optical emission spectroscopy
analysis. |
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Keywords: | |
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