terclim by ICS banner
IVES 9 IVES Conference Series 9 OIV 9 OIV 2024 9 Short communications - Oenology, methods of analysis 9 Determination of steviol glycosides in wine by HPLC

Determination of steviol glycosides in wine by HPLC

Abstract

The SCL laboratory in Bordeaux is one of the two official control laboratories for wine and wine products in france, under the authority of the ministry of finance and two of its general directorates: the DGCCRF (directorate general for competition, consumer affairs and fraud control) and the DGDDI (directorate general of customs and excise duties). In this capacity, it verifies the regulatory compliance of wines and investigates any possible falsifications or fraud. Steviol glycosides are natural sweeteners that are not authorized as additives in wine. The delegated regulation (eu) 2019/934 establishes the oenological practices authorized in the european union, and steviol glycosides are not included in part d setting the limits and conditions for the sweetening of wines. Their use in wines therefore constitutes fraud. Since there is no specific analytical method for the determination of steviol glycosides in the oiv international methods of analysis of wines and musts, the laboratory has developed a simple and rapid method to identify and quantify them by liquid chromatography. The method allows the separation and quantification of the following sweeteners, in the order of elution: rebaudioside d, rebaudioside m, rebaudioside a, stevioside, rebaudioside c, dulcoside, rebaudioside b, steviolbioside. Validation tests for the accreditation of the determination of rebaudioside a and stevioside were carried out on 8 different matrices. The matrices of interest for the oiv are grape juice, white wine, rosé wine, red wine and fortified wine. Accreditation according to ISO/IEC 17025 standard was obtained in 2022. This communication aims to present the implemented method, examples of chromatograms, validation data (detection and quantification limits, uncertainties), as well as the strategy implemented in the absence of interlaboratory comparison circuits for alcoholic matrices such as wines.

Determinación de glicósidos de esteviol en vino por HPLC

El laboratorio scl de Burdeos es uno de los dos laboratorios oficiales de control de productos vitivinícolas en francia, dependiente del ministerio de finanzas y de dos de sus direcciones generales: la DGCCRF (dirección general de competencia, consumo y represión del fraude) y la DGDDI (dirección general de aduanas e impuestos especiales). En este sentido, verifica el cumplimiento normativo de los vinos y busca posibles falsificaciones o fraudes. Los glicósidos de esteviol son edulcorantes naturales que no están autorizados como aditivos en el vino. El reglamento delegado (UE) 2019/934 establece las prácticas enológicas autorizadas en la unión europea, y los glicósidos de esteviol no figuran en la parte d que fija los límites y condiciones para la edulcoración de los vinos. Su uso en los vinos constituye, por lo tanto, un fraude. Dado que no existe un método de análisis específico para los glicósidos de esteviol en la recopilación de métodos internacionales de análisis de vinos y mostos de la oiv, el laboratorio ha desarrollado un método sencillo y rápido para identificarlos y cuantificarlos mediante cromatografía líquida. El método permite separar y cuantificar los siguientes edulcorantes, en orden de elución: rebaudiósido d, rebaudiósido m, rebaudiósido a, estevióside, rebaudiósido c, dulcósido, rebaudiósido b, esteviol-biósido. Los ensayos de validación para la acreditación de la determinación de rebaudiósido a y estevióside se realizaron en 8 matrices diferentes. Las matrices de interés para la oiv son el jugo de uva, el vino blanco, el vino rosado, el vino tinto y el vino de licor. La acreditación según la norma iso/iec 17025 se obtuvo en 2022. Esta comunicación tiene como objetivo presentar el método implementado, ejemplos de cromatogramas, datos de validación (límites de detección y cuantificación, incertidumbres), así como la estrategia implementada en ausencia de circuitos de intercomparación para matrices alcohólicas como los vinos.

Dosage des glycosides de steviol dans le vin par CLHP 

Le laboratoire SCL de bordeaux est l’un des deux laboratoires officiels de contrôle des produits vitivinicoles en France, rattaché au ministère des finances et à deux de ses directions générales : la DGCCRF (direction générale de la concurrence, de la consommation et de la répression des fraudes) et la DGDDI (direction générale des douanes et droits indirects).   A ce titre il vérifie la conformité réglementaire des vins et recherche d’éventuelles falsifications ou fraudes. Les glycosides de stéviol sont des édulcorants naturels qui ne sont pas autorisés comme additifs dans le vin. Le règlement délégué (UE) 2019/934 établit les pratiques œnologiques autorisées dans l’union européenne, et les glycosides de stéviol ne figurent pas dans la partie d fixant les limites et conditions pour l’édulcoration des vins. Leur utilisation dans les vins constitue donc une fraude. Comme il n’existe pas de méthode de dosage spécifique pour les glycosides de stéviol dans le recueil des méthodes internationales d’analyse des vins de l’oiv, le laboratoire a développé une méthode simple et rapide à mettre en œuvre pour les identifier et les quantifier par chromatographie liquide en phase liquide.  La méthode permet de séparer et doser les édulcorants suivants, dans l’ordre d’élution : rébaudioside d, rébaudioside m, rébaudioside a, stévioside, rébaudioside c, dulcoside, rébaudioside b, stéviolbioside.  Les essais de validation en vue de l’accréditation du dosage des rébaudioside a et stévioside ont été réalisés sur 8 matrices différentes. Les matrices d’intérêt pour l’oiv sont un jus de raisin, un vin blanc, un vin rosé, un vin rouge et un vin de liqueur. L’accréditation selon la norme iso/cei 17025 a été obtenue en 2022. Cette communication vise à présenter la méthode mise en œuvre, des exemples de chromatogrammes, les données de validation (limite de détection, de quantification, incertitudes), ainsi que la stratégie mise en œuvre en l’absence de circuits d’intercomparaison pour les matrices alcoolisées telles que les vins.

Publication date: November 18, 2024

Issue: OIV 2024

Type: Article

Authors

Sophie Rosset¹, Nathalie Corradi¹

¹ Service Commun des Laboratoires – Laboratoire de Bordeaux, 3 avenue du Dr Albert Schweitzer, Pessac, France

Contact the author*

Tags

IVES Conference Series | OIV | OIV 2024

Citation

Related articles…

Les outils pour favoriser le renouvellement des générations en viticulture

French lawmakers have chosen the family-type winegrowing business as the benchmark for drafting the legal framework for winegrowing businesses and winegrowers. In france (source: msa), in 2022, there were 1,444 new winegrowers, an increase of 3% compared with 2021, representing 10% of new farm managers. The retention rate for winegrowers is 75% (up 13% on 2021), compared with 77% for all agricultural sectors (stable).

Pierce’s disease of grapevines, a new threat to the wine industry in Southern Europe

Pierce’s disease (PD) is considered a potential threat to european viticulture (EPPO a2 list of pathogens since 1981). In the usa, infections caused by the vector-borne bacterium xylella fastidiosa have caused recurrent damage to vineyards in California and the southeastern states. However, vineyards in Europe have remained free of PD until recently, when it was first detected on the island of Mallorca in 2017. The reasons for the absence of PD in continental Europe have not been convincingly explained.

Contribution of grape seeds to evolution of acetaldehyde, pigments and tannins reactive towards salivary proteins of red wine over time

This study investigated the impact of the gsk/gse ratio on the evolution of acetaldehyde and of major phenolic compounds of aglianico wine in wine like solution and real wine. Four model solutions and the correspondant control wines were prepared. The natural weight ratio between grape skins and seeds was determined on the real grapes, and a control wine was obtained from those.

Baccus: from framework to web platform for self-assessment of wine sustainability

Sustainability is becoming an increasingly present challenge, whether due to an increase in the level of perception and demand from consumers and stakeholders or the rise of events linked to climate change, which directly impacts agricultural-based sectors such as the vine and wine industry.

Evidence of successful wine business strategies: customer acquisition, value or retention?

This presentation illustrates a series of successful wine businesses, which have managed to counter the downward trend impacting the global industry. How these businesses have been successful is explained through the planning and execution of strategies that focused on a clear and consistent aim in attracting new consumers. These cases add weight to the ehrenbergian position that for a business to be successful it must target new customers as a priority over alternative options like increasing value or improving customer retention.