Contribution to the Application of Kálmán Filtering in ICP-OES

A study of emission spectra is presented that investigates the capabilities and the limitations of a multicomponent evaluation method, Kálmán filtering, in ICP-OES. Using computer simulation the possible sources of error in concentration estimation were investigated. With synthetic data we tried to...

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Bibliographic Details
Published inMicrochemical journal Vol. 55; no. 1; pp. 33 - 43
Main Authors Kárpáti, Péter, Wegscheider, Wolfhard, Borszéki, János
Format Journal Article
LanguageEnglish
Published New York, NY Elsevier B.V 01.01.1997
Elsevier
Subjects
Analytical chemistry
Chemistry
Exact sciences and technology
Spectrometric and optical methods
Bauxite
Emission spectrometry
Chemical analysis
Multicomponent analysis
Computer simulation
Multicomponent mixture
Kalman filtering
Inductive coupling plasma spectrometry
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Summary:A study of emission spectra is presented that investigates the capabilities and the limitations of a multicomponent evaluation method, Kálmán filtering, in ICP-OES. Using computer simulation the possible sources of error in concentration estimation were investigated. With synthetic data we tried to simulate real spectra containing all effects that can influence the appearance of the peaks within a real spectral window. After this, model solutions with known composition were prepared, analyzed, and evaluated by means of the Kálmán filter. Finally, bauxite matrices were digested and analyzed. The results of the evaluation performed by the conventional method in ICP emission spectrometry (automatic background correction (ABC)) and the Kálmán filter were compared to the certificate for the bauxite standard samples. It will be shown that in interference-free cases the two evaluation procedures give comparable results; for more complex spectra, Kálmán filtering is superior.
ISSN:0026-265X
1095-9149
DOI:10.1006/mchj.1996.1350