Automatic correction of continuum background in laser-induced breakdown and Raman spectrometry
| Autor: | I. B. Gornushkin, P. E. Eagan, A. B. Novikov, B. W. Smith, J. D. Winefordner |
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| Rok vydání: | 2003 |
| Předmět: |
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Polynomial Continuum (design consultancy) Minor (linear algebra) Analytical chemistry Spectrum Analysis Raman 01 natural sciences Sensitivity and Specificity Standard deviation 010309 optics symbols.namesake 0103 physical sciences Instrumentation Spectroscopy Physics Group (mathematics) Lasers 010401 analytical chemistry Mathematical analysis Reproducibility of Results Function (mathematics) 0104 chemical sciences Maxima and minima symbols Raman spectroscopy Artifacts Plastics Algorithms |
| Zdroj: | Applied spectroscopy. 57(2) |
| ISSN: | 0003-7028 |
| Popis: | The approximation of a spectral continuum by determining a plurality of minima in the spectral data; splitting the spectral data into a predetermined number of groups N; for each group of spectral data, determining major minima for the group, and calculating an average and a standard deviation for the determined major minima; determining a polynomial function that can be drawn through the major minima of all groups; for each group of spectral data, determining minor minima; calculating an average deviation (Φ N ) between this polynomial function and the determined minor minima; reducing the number of groups, and repeating this process for the reduced number of groups until a minimum number of groups is reached. Then, the least Φ N corresponding to an optimal number of groups N opt is determined. The spectral data is split into N opt groups; and a polynomial function that can be drawn through both the major minima and minor minima is determined for N opt groups. This polynomial function approximates the spectral continuum. |
| Databáze: | OpenAIRE |
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