Net analyte signal calculation for multivariate calibration

J. Ferre, N.M. Faber

    Research output: Contribution to journalArticleAcademicpeer-review

    95 Citations (Scopus)

    Abstract

    A unifying framework for calibration and prediction in multivariate calibration is shown based on the concept of the net analyte signal (NAS). From this perspective, the calibration step can be regarded as the calculation of a net sensitivity vector, whose length is the amount of net signal when the value of the property of interest (e.g. analyte concentration) is equal to unity. The prediction step can be interpreted as projecting a measured spectrum onto the direction of the net sensitivity vector. The length of the projected spectrum divided by the length of the net sensitivity vector is the predicted value of the property of interest. This framework, which is equivalent to the univariate calibration approach, is used for critically revising different definitions of NAS and their calculation methods. The framework is particularized for the classical least squares (CLS), principal component regression (PLS) and partial least-squares (PCR) regression models
    Original languageEnglish
    Pages (from-to)123-136
    JournalChemometrics and Intelligent Laboratory Systems
    Volume69
    Issue number1-2
    DOIs
    Publication statusPublished - 2003

    Keywords

    • partial least-squares
    • simultaneous spectrophotometric determination
    • spectroscopic analysis
    • wavelength selection
    • multicomponent analysis
    • emission-spectrometry
    • preprocessing methods
    • chemometric analysis
    • sensitivity
    • interrelationships

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