One-point calibration for calibration-free laser-induced breakdown spectroscopy quantitative analysis |
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| Affiliation: | 1. Instituto de Fìsica, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/nº – Campus da Praia Vermelha – CEP 24210-346 – Niterói – Rio de Janeiro, Brazil;2. Institute of Chemistry of Organometallic Compounds, Research Area of National Research Council, Via G. Moruzzi, 1 — 56124 Pisa, Italy;1. Chemical Diagnostics and Engineering, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States;2. Physical Chemistry and Applied Spectrosco''py, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States;3. Physics and Chemistry of Materials, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States;4. Space and Remote Sensing, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States;1. Department of Scienze della Terra e Geoambientali, University of Bari, Bari, Italy;2. Institute of Chemistry of Organometallic Compounds, CNR, Pisa, Italy;3. Department of Chemistry, University of Bari, Bari, Italy;4. Department of Earth Sciences, University of Pisa, Pisa, Italy;1. Department of Information Engineering, Largo Lucio Lazzarino 1, 56122 Pisa, Italy;2. Applied and Laser Spectroscopy Laboratory, Institute of Chemistry of Organometallic Compounds, Research Area of CNR, Via G. Moruzzi 1, 56124 Pisa, Italy |
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| Abstract: | We present a new method for improving the reliability of quantitative analysis by laser-induced breakdown spectroscopy (LIBS). The method can be considered as a variation of the calibration-free LIBS approach; although not completely standard-less, only one standard of known composition and similar matrix to the one to be analyzed is needed. On the other hand, the one-point calibration approach allows the empirical determination of essential experimental and spectroscopic parameters, whose knowledge is often imprecise or lacking; the result is a definite improvement of the trueness of LIBS analysis with respect to the traditional calibration-free approach.The characteristics and advantages of the proposed one-point calibration LIBS approach will be demonstrated on a set of copper-based samples of known composition. |
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