The verification of food identity and traceability is of urgent importance in the current context of a growing market globalisation. As a result, food control is an indispensable as well as essential aspect in today's consumer protection. Not at least because of an increasing product knowledge, the continuous development of production technologies, and increasing diversity of the products, intensive efforts are ongoing in analytical science to adapt the chemical analysis to requirements with regard to flexibility, sensibility, specificity, and selectivity.The matrix wine provides a special challenge to the chemical analysis and thus to food control. Its valuable characteristics are based on different factors, such as geographical origin associated with the growing conditions, vintage and the grape variety. Accordingly, the range of analytical methods to enable a comprehensive characterisation of these products is highly diversified. 1H-NMR spectroscopy is currently employed to characterize wine in terms of targeted as well as non-targeted analysis in only a few minutes and therefore allows the simultaneous investigation of diverse parameters. As the targeted approach enables an identification and quantification of different wine key ingredients, the non-targeted, also called fingerprinting analysis, with subsequent statistical data evaluation investigates the whole spectrum of the matrix. Therefore, the capability to detect known adulterants, but also the ability to detect further abnormalities, and the assessment of challenging authentication parameters (grape variety, origin, vintage) appoint this technique of utmost interest for quality control, research and control institutions. Current relevant scientific literature is typically based on feasibility or research studies within one laboratory on one instrument exclusively, which restricts validation possibilities, particularly concerning the non-targeted approaches. Validation of the whole analytical procedure including statistical data evaluation and consistency of the measurement over time, instruments and laboratories is, however, essential for routine application and in official control. Therefore, the use of non-targeted fingerprinting approaches is due to actual missing validation strategies still restricted for official control purposes, thereby offering complex challenges for the scientific community.Nevertheless, powerful commercial solutions are already available which unify measurements from different instruments of the same type and vendor by using a standardized operating procedure (including sample preparation and measurement protocol), which allows evaluation of the data with the same statistical models.These commercial developments will be presented and discussed as well as own research results on wine authentication by 1H-NMR spectroscopy.

Authentication of wine by <sup>1</sup>H-NMR spectroscopy: Opportunities and challenges

248th National Meeting (2014)

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Authentication of wine by 1H-NMR spectroscopy: Opportunities and challenges

Authentication of wine by ¹H-NMR spectroscopy: Opportunities and challenges