Isotope partitioning between cow milk and farm water: A tool for verification of milk provenance.

ABSTRACT:

Rationale

The oxygen and hydrogen isotope compositions of the water component of the milk from nine Italian dairy farms were studied together with the farm water for one year. The aim was to verify the importance of farm water and seasonal temperature variation on milk isotope values and propose mathematical relations as new tools to identify the milk origin.

Methods

Milk was centrifuged to separate the solids and then distilled under vacuum to separate water. δ(¹⁸ O/¹⁶ O) and δ(² H/¹ H) analyses of the water molecules were carried out using a water equilibrator online with a mass spectrometer. For oxygen and hydrogen isotope determination, water was equilibrated with pure CO₂ for 7.5 h and with pure H₂ for 5 

SUBMITTER: Boito M 

PROVIDER: S-EPMC8519040 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature