NIR detection of honey adulteration reveals differences in water spectral pattern

作者：Bazar Gyorgy^*; Romvari Robert; Szabo Andras; Somogyi Tamas; Eles Viktoria; Tsenkova Roumiana

来源：Food Chemistry, 2016, 194: 873-880.

DOI：10.1016/j.foodchem.2015.08.092

• Near infrared spectroscopy
• Aquaphotomics
• Honey
• Fructose
• Water
• Aliment
• Adulteration
• Fraud

High fructose corn syrup (HFCS) was mixed with four artisanal Robinia honeys at various ratios (0-40%) and near infrared (NIR) spectra were recorded with a fiber optic immersion probe. Levels of HFCS adulteration could be detected accurately using leave-one-honey-out cross-validation (RMSECV = 1.48; R-CV(2) = 0.987), partial least squares regression and the 1300-1800 nm spectral interval containing absorption bands related to both water and carbohydrates. Aquaphotomics-based evaluations showed that unifloral honeys contained more highly organized water than the industrial sugar syrup, supposedly because of the greater variety of molecules dissolved in the multi-component honeys. Adulteration with HFCS caused a gradual reduction of water molecular structures, especially water trimers, which facilitate interaction with other molecules. Quick, non-destructive NIR spectroscopy combined with aquaphotomics could be used to describe water molecular structures in honey and to detect a rather common form of adulteration.

• 出版日期2016-3-1