Element content is a highly reliable marker for niche vegetable oils

Abstract

The content of twelve elements encountered in four different vegetable oils, each coming from a specific geographical location was precisely determined by ICP-AES over three consecutive years (2015-2017). For each oil type, results were remarkably reproducible indicating that element composition is a powerful fingerprint to depict an oil. Our results allow us to suggest that, once the vegetable origin of any niche oil has been certified (using its element content or not), element content determination can sign its geographical origin.