Precise determination of the strontium isotope ratios in wine by inductively coupled plasma sector field multicollector mass spectrometry (ICP-SF-MC-MS)

Mireille Barbaste (1) , K. Robinson , S. Guilfoyle , B. Medina , Ryszard Lobinski (1)

1 LCABIE - Laboratoire de Chimie Analytique Bio-Inorganique et Environnement

The 87Sr/86Sr isotope ratio of wine reflects that of the soil on which the vine is grown and is characteristic of the geographical origin of wine. A method based on ICP-MS using a sector field mass analyser with a multicollector able to reach the precision required for the discrimination of different wines (<0.005%) was developed. Strontium was separated from Rb (to avoid the 87Sr/87Rb isobaric interference) and the Sr-rich fraction was nebulized into the ICP. Precision values of 0.002-0.003% were routinely measured. The accuracy of the method, evaluated by analysis of the NIST SRM 987 (SrCO3, isotopic), was 0.02%. The analysis of 11 wines of different origins showed a clear difference between wines produced on basaltic, mixed and granitic soil areas.

Domaines: Chimie analytique

Mireille Barbaste, K. Robinson, S. Guilfoyle, B. Medina, Ryszard Lobinski. Precise determination of the strontium isotope ratios in wine by inductively coupled plasma sector field multicollector mass spectrometry (ICP-SF-MC-MS). Journal of Analytical Atomic Spectrometry, 2002, 17 (2), pp.135-137. ⟨10.1039/b109559p⟩. ⟨hal-00291404⟩