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Stable isotope analysis of plant-derived nitrate – Novel method for discrimination between organically and conventionally grown vegetables

Mihailova, Alina; Pedentchouk, N. and Kelly , S.D. (2014) Stable isotope analysis of plant-derived nitrate – Novel method for discrimination between organically and conventionally grown vegetables. Food Chemistry, 154, pp. 238-245.

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Summary

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 plant-derived nitrate has been observed. Nitrogen and oxygen isotope analysis of nitrate has a potential for differentiation between organic and conventional crops. Further analysis is needed to improve our understanding of the scope of application and robustness of this compound-specific approach.


EPrint Type:Journal paper
Subjects:"Organics" in general
Values, standards and certification > Assessment of impacts and risks
Knowledge management > Education, extension and communication
Research affiliation: European Union > CORE Organic II > AuthenticFood
H2020 or FP7 Grant Agreement Number:249667
Deposited By: Holst Laursen, Assis Prof Kristian
ID Code:26740
Deposited On:15 Aug 2014 08:57
Last Modified:15 Aug 2014 08:57
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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