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Is it really organic? - Multi-isotopic analysis as a tool to discriminate between organic and conventional plants

Laursen, K.H.; Mihailova, A.; Kelly, S.D.; Epov, Vladimir; Bérail, Sylvain; Schjoerring, J.K.; Donard, O.F.X.; Larsen, E.H.; Pedentchouk, N.; Marca-Bell, A.D.; Halekoh, U.; Olesen, J.E. and Husted, S. (2013) Is it really organic? - Multi-isotopic analysis as a tool to discriminate between organic and conventional plants. Food Chemistry, pp. 2812-2820.

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Document available online at: https://hal.archives-ouvertes.fr/hal-01590285


Summary

Novel procedures for analytical authentication of organic plant products are urgently needed. Here we present the first study encompassing stable isotopes of hydrogen, carbon, nitrogen, oxygen, magnesium and sulphur as well as compound-specific nitrogen and oxygen isotope analysis of nitrate for discrimination of organically and conventionally grown plants. The study was based on wheat, barley, faba bean and potato produced in rigorously controlled long-term field trials comprising 144 experimental plots. Nitrogen isotope analysis revealed the use of animal manure, but was unable to discriminate between plants that were fertilised with synthetic nitrogen fertilisers or green manures from atmospheric nitrogen fixing legumes. This limitation was bypassed using oxygen isotope analysis of nitrate in potato tubers, while hydrogen isotope analysis allowed complete discrimination of organic and conventional wheat and barley grains. It is concluded, that multi-isotopic analysis has the potential to disclose fraudulent substitutions of organic with conventionally cultivated plants. © 2013 Elsevier Ltd. All rights reserved.


EPrint Type:Journal paper
Subjects:"Organics" in general
Research affiliation: France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
ISSN:ISSN: 0308-8146
DOI:10.1016/j.foodchem.2013.05.068
Project ID:HAL-INRAe
Deposited By: PENVERN, Servane
ID Code:41459
Deposited On:12 Aug 2021 10:37
Last Modified:12 Aug 2021 10:37
Document Language:English

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