Elemental and Isotopic Fingerprints of Potatoes

Area of Science:

• Agricultural Science
• Food Science
• Analytical Chemistry

Background:

• Food traceability is crucial for global trade and consumer trust, especially for premium products like traditionally grown foods.
• Potatoes are a globally significant food staple, making their origin and authenticity important market factors.
• Consumer demand for regional specialties drives the need for reliable methods to verify food provenance.

Purpose of the Study:

• To develop and validate a method for distinguishing the geographical origin of potato samples.
• To identify key elemental and isotopic markers indicative of Romanian potatoes.
• To support food traceability initiatives within the potato supply chain.

Main Methods:

• Analysis of 100 potato samples (68 Romanian, 32 imported) using multi-elemental and isotopic fingerprinting.
• Application of Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Isotope Ratio Mass Spectrometry (IRMS).
• Statistical analysis employing Linear Discriminant Analysis (LDA) to differentiate sample origins.

Main Results:

• Multi-elemental and isotopic analyses provided distinct fingerprints for potato samples.
• The study identified specific markers, including carbon stable isotope ratios (δ13Cbulk), deuterium stable isotope ratios (δ2Hwater), and strontium (Sr) content, as key indicators.
• Linear Discriminant Analysis successfully differentiated potato samples based on their geographical origin.

Conclusions:

• The combined use of δ13Cbulk, δ2Hwater, and Sr concentrations is a reliable method for determining the geographical origin of potatoes.
• This analytical approach enhances food traceability, particularly for identifying authentic Romanian potatoes.
• The findings contribute to ensuring consumer confidence and supporting fair trade practices in the potato market.