Uncertainty of Integrated Intensity Following Line Profile Fitting of Multiline Spectra

A novel method of determining the total uncertainty in the integrated intensity of fitted emission lines in multipeaked emission spectra is presented. The proposed method does not require an assumption of the type of line profile to be specified. The absolute difference between a fit and measured sp...

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Bibliographic Details
Published in:Applied spectroscopy 2018-05, Vol.72 (5), p.787-792
Main Authors: Surmick, David M., Boukari, Hacene, Woodward, Jonathan, Stowe, Ashley C., Melikechi, Noureddine
Format: Article
Language:English
Subjects:
Fitting
Laser-Induced Breakdown Spectroscopy
MATERIALS SCIENCE
Uncertainties
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Summary:A novel method of determining the total uncertainty in the integrated intensity of fitted emission lines in multipeaked emission spectra is presented. The proposed method does not require an assumption of the type of line profile to be specified. The absolute difference between a fit and measured spectrum defines the uncertainty of the integrated signal intensity and is subsequently decomposed to determine the uncertainty of each peak in multiline fits. Decomposition relies on tabulating a weighting factor, which describes how each peak contributes to the total integral uncertainty. Applications of this method to quantitative approaches in laser-induced breakdown spectroscopy analysis are described.
ISSN:0003-7028
1943-3530
DOI:10.1177/0003702818756652