PRELIMINARY STUDY OF TRACEABILITY ON THE

SOIL-PLANT-GRAPE CHAIN

D.A. Magdas*, S. M. Cuna

National Institute for Research and Development of Isotopic and Molecular Technologies,

65-103 Donath Str., P.O.Box 700, RO-400293 Cluj-Napoca 5, Romania

ABSTRACT

This work presents a preliminary study on the carbon isotope signature on the soil-plant-grape chain. The samples were collected from two Romanian viticulture areas namely Recas and Jidvei. The soil samples were collected from three depths in order to characterize better the soil from the studied areas. The average value of the δ¹³C at the soil surface is around δ¹³C ≈ -25‰ and important differences of the δ¹³C values between the two studied areas were not observed. Meanwhile, differences between leaves samples collected from each studied region relived significant differences at about 1.5‰ between Feteasca Regala sort (from Jidvei) and Cabernet Sauvignon (Recas). Also differences between δ¹³C values of different grape sort coming from the same area were identified. We have correlated the isotopic signatures of soil, plants and grape for each area to highlight differences between these two areas from isotopic viewpoint. This is the base for our study about the traceability of the wines.

KEYWORDS: 13C, soil, IRMS