title: 1H NMR profiling as an approach to differentiate conventionally and organically grown tomatoes.
abstract: This study describes the approach of (1)H NMR profiling for the authentication of organically produced tomatoes (Solanum lycopersicum). Overall, 361 tomato samples of two different cultivars and four different producers were regularly analyzed during a 7 month period. The results of principal component analysis showed a significant trend for the separation between organically and conventionally produced tomatoes (p < 0.001 using the t test). Linear discriminant analysis demonstrated good discrimination between the growing regimens, and external validation showed 100% correctly classified tomato samples. Further validation studies, however, also disclosed unexpected differences between individual producers, which interfere with the aim of predicting the cultivation method, yet the results indicate significant differences between (1)H NMR spectra of organically and conventionally grown tomatoes.
authors: Bavarian Health and Food Safety Authority, Luitpoldstraße 1, 97082 Würzburg, Germany.
authors: Monika
authors: M
authors: Hohmann
authors: Norbert
authors: N
authors: Christoph
authors: Helmut
authors: H
authors: Wachter
authors: Ulrike
authors: U
authors: Holzgrabe
mesh_terms: D000383:Agriculture; D016002:Discriminant Analysis; D058870:Food, Organic / Q000032:analysis; D005638:Fruit / Q000737:chemistry* / Q000254:growth & development; D018551:Solanum lycopersicum / Q000737:chemistry* / Q000254:growth & development; D058871:Organic Agriculture; D066244:Proton Magnetic Resonance Spectroscopy / Q000379:methods*
keywords: 1H NMR; Solanum lycopersicum; conventional; multivariate data analysis; organic; tomato