Affiliation:
1. National University of Science and Technology MISiS
2. FSBSI “Federal Scientific Agroengineering Center VIM”
Abstract
Heterogeneous material analysis by the laser-induced breakdown
spectroscopy (LIBS) technique is challenging in real practice due to
requirements for representative sampling and non-flat surfaces of the
samples. Methods complementary to LIBS (plasma imaging, plasma
acoustics, sample surface color imaging) have been introduced to
improve zinc (Zn) determination in soybean grist material by LIBS. The
detailed statistical study revealed that atomic/ionic lines emission
and other LIBS signals were distributed normally except for acoustics
signals. The correlation between LIBS and complementary signals was
rather poor due to the large variability of the particle properties of
soybean grist material. Still, analyte line normalization on plasma
background emission was rather simple and effective for Zn analysis
but required a few hundred spot samplings for representative Zn
quantification. Non-flat heterogeneous samples (soybean grist pellets)
were analyzed by LIBS mapping but it was demonstrated that the choice
of sampling area is crucial for reliably analyte determination.
Funder
Ministry of Science and Higher Education
of the Russian Federation
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
1 articles.
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