Elimination of spectral interferences in the reaction of 2-thiobarbituric acid with malonaldehyde, 2-furfuraldehyde and 5-hydroxymethyl-2-furfuraldehyde by partial least squares multivariate calibration (PLS) |
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| Authors: | A Espinosa-Mansilla A Muñoz de la Peña F Salinas and M Martínez Galera |
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| Institution: | (1) Department of Analytical Chemistry, University of Extremadura, E-06071 Badajoz, Spain;(2) Department of Analytical Chemistry, Experimental Sciences Faculty of Almería, University of Granada, E-04071 Almería, Spain |
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| Abstract: | Summary The spectral resolution of ternary mixtures of malonaldehyde (MLD), 2-furfuraldehyde (FUR) and 5-hydroxymethyl-2-furfuraldehyde (HMF) in the presence of glyoxal and biliverdine is achieved by partial least squares multivariate calibration (PLS). The spectrophotometric method is based on the reaction of these substances with 2-thiobarbituric acid (TBA). A calibration set of standard samples has been statistically designed in the presence of adequate amounts of both interferent compounds in several degrees of concentration. The possibility of a spectrophotometric determination of mixtures of MLD, FUR and HMF in the presence of glyoxal and biliverdine is demonstrated. A comparative study of the results found by application of PLS-1 and PLS-2 methods is presented. |
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