FTIR characterization of Hungarian acacia honeys

Blay, Agyili
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Kötet címe (évfolyam száma)
Honey has long been investigated as an indicator of the environmental background of the nectar producing area. The chemical characterization of honeys provides information regarding the geographical background of the collecting location and also can be affected by the botanical origin. For this study a unique sample series was provided, collected mostly from the same nectar producing area of Hungary, the same species and beekeeper, from 1958 to 2020. (FTIR) technique was used to determine if the organic compounds show similar pattern to the inorganic ones considering the years of origin. The FTIR-ATR spectral data was pre-processed by the Savitzky-Golay smoothing method, and further corrected by multiplicative scatter correction (MSC), Principal component analysis (PCA) was used to evaluate the results with regards the year of acacia honey sample origin. The PCA analysis of smoothed FTIR spectral data showed no markedly significant difference with respect the collecting years. We can conclude, that the organic constituents of the sample collecting area is either rather unvarying considering the last few decades, or in contrast to the inorganic elements, organic compounds do not accumulate or are not preserved in honey samples FTIR technique was a useful to differentiate between the geographical and botanical origin, but provided no information to discriminate between the years of origin.
FTIR, acacia honeys, honey spectral, Savitzky-Golay smoothing method, Multiplicative Scatter Correction (MSC) and Principal Component Analysis (PCA))