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Non-linear robust regression procedure for calibration in flame atomic absorption spectrometry

Authors
  • Kościelniak, Paweł
Type
Published Article
Journal
Analytica Chimica Acta
Publisher
Elsevier
Publication Date
Jan 01, 1993
Volume
278
Issue
1
Pages
177–187
Identifiers
DOI: 10.1016/0003-2670(93)80095-3
Source
Elsevier
Keywords
License
Unknown

Abstract

Robust regression methods based on the median, namely the single median and the repeated median methods, were developed to adapt them to those cases occurring in flame atomic absorption spectrometry (FAAS) when non-linear calibration relationships are encountered. All essential features of the median methods were preserved owing to the modification suggested and the regression procedures are simple and easy to apply, allowing outliers to be detected and rejected. The resistance of the methods considered to the effect of outliers is discussed. The effectiveness of the median approaches and some advantages over the least-squares non-linear regression method are revealed in examples with both hypothetical data and real calibration data obtained from FAAS.

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