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| Laursen, K.H.; Mihailova, A.; Kelly , S.D.; Epov, V.N.; Berail, S.; Schjoerring, J.K.; Donard, O.F.X.; Larsen, E.H.; Pedentchouck, N.; Marca-Bell, A.D.; Halekoh, U.; Olesen, Jørgen E.; Husted, S.. |
| 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 fertilized with synthetic nitrogen fertilizers or green manures from atmospheric nitrogen fixing legumes. This limitation was bypassed... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general Farming Systems Crop husbandry Technology transfer Values; Standards and certification Food systems Education; Extension and communication. |
| Ano: 2013 |
URL: http://orgprints.org/22891/1/Food%20Chem%202013.pdf |
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| Laursen, K.H.; Mihailova, A.; Kelly , S.D.; Epov, V.N.; Berail, S.; Schjoerring, J.K.; Donard, O.F.X.; Larsen, E.H.; Pedentchouck, N.; Marca-Bell, A.D.; Halekoh, U.; Olesen, Jørgen E.; Husted, S.. |
| 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 fertilized with synthetic nitrogen fertilizers or green manures from atmospheric nitrogen fixing legumes. This limitation was bypassed... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general Farming Systems Crop husbandry Technology transfer Values; Standards and certification Food systems Education; Extension and communication. |
| Ano: 2013 |
URL: http://orgprints.org/22772/7/22772.pdf |
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| Mihailova, Alina; Pedentchouk, N.; Kelly , S.D.. |
| The lack of reliable markers for the discrimination between organic and conventional products makes the organic food market susceptible to attempted fraud. Robust analytical methodologies for organic food authentication are urgently needed. In this study a new approach, compound-specific nitrogen and oxygen isotope analysis of plant-derived nitrate, has been applied alongside bulk nitrogen isotope analysis for discrimination between organically and conventionally greenhouse-grown lettuce and retail potatoes and tomatoes. The method revealed significant differences between conventional and organic fertilisation. An intra-plant isotopic variation as well as significant impact of the fertiliser application rate on the nitrogen and oxygen isotope values of... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general Technology assessment Education; Extension and communication. |
| Ano: 2014 |
URL: http://orgprints.org/26740/7/26740.pdf |
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