First results on the determination of stable isotopes of C and N in casein and elemental composition in Slovenian milk were presented. Concentrations of P, S, Cl, K, Ca, Zn, Br, Rb, Sr were performed with reflection X-ray fluorescence spectrometry (XRF), while trace elements were determined with inductively coupled plasma mass spectrometry (ICP-MS). The measurements of stable C and N isotopes expressed with δ13C in δ15N values were obtained by isotope ratio mass spectrometer for light elements. The broad range in δ13C in δ15N values were obtained in different geographical region. δ13C values ranged from -27.9 to -19.1‰ and δ15N values ranged from +3.3 to +6.9‰. The differences indicated the different food habits of cows. The obtained results will present the basis for a database of authentic samples of cow milk in Slovenia.
COBISS.SI-ID: 26272807
The paper presents methods including stable isotopic composition of O and elemental composition for determining the geographical origin of apple juice. The data are statistically evaluated. The same approach will be used for determining the geographical origin of milk.
COBISS.SI-ID: 3932024