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|Título:||Application of Mid- and Near-Infrared Spectroscopy for the Control and Chemical Evaluation of Brine Solutions and Traditional Sea Salts|
|Autor:||Galvis-Sánchez, Andrea C.|
Santos, Inês C.
Lopes, João A.
Rangel, António O.S.S.
|Citação:||GALVIZ-SÁNCHEZ, Andrea C....[et al.] - Application of Mid- and Near-Infrared Spectroscopy for the Control and Chemical Evaluation of Brine Solutions and Traditional Sea Salts. Food Analytical Methods. ISSN 1936-9751. vol. 6, nº2 (2013) p.470-480|
|Resumo:||Mid- and near-infrared spectroscopy methodologies were explored for the analysis of brine solutions and traditional sea salt samples. Brine solutions from different salt pans, corresponding to different stages of sodium chloride crystallisation, were collected. A total of 61 dried and non-dried traditional sea salts were also analysed. Partial least squares regression with leave-one-out cross-validation strategy was applied for the calibration of inorganic constituents Ca2+, Mg2+ and K+, alkalinity as HCO3 −, SO4 2−, NO2 − and NO3 − and phosphate in brine solutions. Promising results were obtained with the near-infrared (NIR) methodology for brine solutions with coefficients of determination R2>0.90 for Mg+2, K+, HCO3 − and SO4 2−. Using mid-infrared, the calibration for H2PO4 − was R200.85. In relation to the sea salt samples, the strategy adopted was the re-sampling based cross-validation using different spectral pre-processing treatments. In this case, the calibrations using the two IR methodologies fell bellow acceptable levels for the techniques; however, by comparing the R2 coefficient, the results were slightly better when using the NIR spectra of dried sea samples. In general, these results open a new possibility for the IR applications and also bring an opportunity for continuing with the NIR characterization for dried sea salt samples.|
|Versão do Editor:||DOI 10.1007/s12161-012-9458-7|
|Aparece nas colecções:||CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review|
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