Journal Highlight: Traceability along the production chain of Italian tomato products on the basis of stable isotopes and mineral composition

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  • Published: Apr 4, 2011
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thumbnail image: Journal Highlight: Traceability along the production chain of Italian tomato products on the basis of stable isotopes and mineral composition

Traceability along the production chain of Italian tomato products on the basis of stable isotopes and mineral composition

Rapid Communications in Mass Spectrometry 2011, 25, 899-909
Luana Bontempo, Federica Camin, Lara Manzocco, Giorgio Nicolini, Ron Wehrens, Luca Ziller, Roberto Larcher

Abstract: The paper shows the variability of stable isotope ratios and mineral composition in tomato and derivatives along the production chain (juice, passata and paste) in order to evaluate the possibility of tracing their geographical origin. The ratios 13C/12C, 15N/14N, 18O/16O, D/H, 34S/32S and the content of Li, Be, B, Na, Mg, Al, P, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Rb, Sr, Y, Mo, Ag, Cd, Sn, Sb, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Tm, Yb, Ir, Tl, Pb, U and of nitrates, chlorides, sulphates and phosphates were measured by Isotope Ratio Mass Spectrometry, Inductively Coupled Plasma Mass Spectrometry and Ion Chromatography, respectively. The tomato products were from three Italian regions - Piedmont, Emilia Romagna, and Apulia. By applying linear discriminant analysis on 17 of these parameters (Gd, La, Tl, Eu, Cs, Ni, Cr, Co, delta34S, delta15N, Cd, K, Mg, delta13C, Mo, Rb and U) excellent discrimination among products from the three regions was achieved. Irrespective of the processing technology, over 95% of the samples were correctly reclassified in cross-validation into the production site. The use of these parameters will allow the development of analytical control procedures that can be used to check the geographical provenance of Italian tomatoes and products derived from them.

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The variability of stable isotope ratios and mineral composition in tomato and derivatives was determined along the production chain (juice, passata and paste) in order to evaluate the possibility of tracing their geographical origin.

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