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Determining performance parameters in qualitative multivariate methods using probability of detection (POD) curves. Case study: Two common milk adulterants

  • Dades identificatives

    Identificador: PC:2645
    Autors:
    Callao, M.P.Gondim, C.D.S.Junqueira, R.G.de Souza, S.V.C.Ruisánchez, I.
    Resum:
    DOI: 10.1016/j.talanta.2016.12.065 URL: http://www.sciencedirect.com/science/article/pii/S0039914016310128 Filiació URV: SI Memòria
  • Altres:

    Autor segons l'article: Callao, M.P.; Gondim, C.D.S.; Junqueira, R.G.; de Souza, S.V.C.; Ruisánchez, I.
    Departament: Química Analítica i Química Orgànica
    Autor/s de la URV: CALLAO LASMARIAS, MARÍA PILAR; Gondim, C.D.S.; Junqueira, R.G.; de Souza, S.V.C.; RUISANCHEZ CAPELASTEGUI, MARÍA ICIAR
    Paraules clau: Milk adulteration SIMCA Method validation
    Resum: A strategy for determining performance parameters of two–class multivariate qualitative methods was proposed. As case study, multivariate classification methods based on mid-infrared (MIR) spectroscopy coupled with the soft independent modelling of class analogy (SIMCA) technique for detection of hydrogen peroxide and formaldehyde in milk were developed. From the outputs (positive/negative/inconclusive) of the samples, which were unadulterated and adulterated at target value, the main performance parameters were obtained. Sensitivity and specificity values for the unadulterated and adulterated classes were satisfactory. Inconclusive ratios 12% and 21%, respectively, for hydrogen peroxide and formaldehyde were obtained. To evaluate the performance parameters related to concentration, Probability of Detection (POD) curves were established, estimating the decision limit, the capacity of detection and the unreliability region. When inconclusive outputs were obtained, two additional concentration limits were defined: the decision limit with inconclusive outputs and the detection capability with inconclusive outputs. The POD curves showed that for concentrations below 3.7 g L−1 of hydrogen peroxide and close to zero of formaldehyde, the chance of giving a positive output (adulterated sample) was lower than 5%. For concentrations at or above 11.3 g L−1 of hydrogen peroxide and 10 mg L−1 of formaldehyde, the probability of giving a negative output was also lower than 5%.
    Grup de recerca: Grup de Quimiometria, Qualimetria i Nanosensors
    Àrees temàtiques: Chemistry Química Química
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0039-9140
    Identificador de l'autor: 0000-0003-2691-329X ; 0000-0003-0889-6596; n/a; n/a; 0000-0002-7097-3583
    Data d'alta del registre: 2017-03-21
    Pàgina final: 30
    Volum de revista: 168
    Versió de l'article dipositat: info:eu-repo/semantics/submittedVersion
    Enllaç font original: https://www.sciencedirect.com/science/article/abs/pii/S0039914016310128?via%3Dihub
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.1016/j.talanta.2016.12.065
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2017
    Pàgina inicial: 23
    Tipus de publicació: Article Artículo Article
  • Paraules clau:

    Anàlisi multivariable
    Llet -- Adulteració i inspecció
    Milk adulteration
    SIMCA
    Method validation
    Chemistry
    Química
    Química
    0039-9140
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