Journal
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
Volume 31, Issue 4, Pages 961-967Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ja00500k
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Funding
- Major Scientific Instrument and Equipment Development Special Funds of China [2011YQ160017]
- National Natural Science Foundation of China [61575073, 51429501, 61378031]
- Fundamental Research Funds for the Central Universities [HUST: 2015TS075]
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The self-absorption effect will seriously influence the accuracy of quantitative analyses using laser-induced breakdown spectroscopy (LIBS). To reduce the self-absorption effect, elements Na and K (major elements) and Pb and Cu (minor elements) in soil plasmas have been studied by spatially resolved LIBS (SRLIBS). The 2-dimensional distributions of line intensities and self-absorption coefficients of lines in the plasmas were investigated and the influence parameters of the self-absorption effect were also studied. Results have shown that the self-absorption effect could be reduced greatly and the accuracy of quantitative LIBS could be improved obviously by selecting the collecting zones of the plasmas carefully. Meanwhile, a high laser energy and a short delay time could be useful to expand the region which is influenced slightly by the self-absorption effect.
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