Determination of Mixed Spirits in Brandy by Fluorescence Spectrometry
Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava
The determination has been carried out using excitation-emission matrix fluorescence along with parallel factor analysis (PARAFAC), partial least-squares regression (PLS) and multiple linear regression (MLR). Calibration models consisting of varying spirit composition and brandy were constructed and their accuracy was evaluated through the root-mean-square error of prediction (RMSEP). PLS was a better method compared with MLR due to its lower RMSEP values. The right-angle cell geometry of fluorescence measurements yielded better results than the front-face technique.
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