Straightforward strategy for quantifying rotundone in wine at ng L−1 level using solid-phase extraction and gas chromatography-quadrupole mass spectrometry. Occurrence in different varieties of spicy wines. (1st September 2016)

• Record Type: Journal Article
• Authors: Culleré, Laura; Ontañón, Ignacio; Escudero, Ana; Ferreira, Vicente
• Is Part Of: Food chemistry. Volume 206(2016)
• Page Start: 267
• Page End: 273
• Publication Date: 2016-09-01
• Subjects: Rotundone -- Wine -- Black pepper -- Maturana tinta -- Schioppettino -- Gamay -- Graciano -- Aroma; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2016.03.039
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Rotundone is responsible for spicy note in wine with a low odor threshold (ng L −1 ). A novel easier method to quantify rotundone at ng L −1 level in wine is developed. Quality parameters such as linearity, sensitivity and precision were satisfactory. Thirty wines belong to different "spicy" varieties have been analyzed. Two wines (a Duras and a Maturana tinta) exhibited levels higher than 100 ng L −1 . Abstract: This paper presents a straightforward methodology to quantify rotundone in wine at ng L −1 level. This compound, responsible for the black pepper aromatic note, may have sensorial relevance in some wines due to its low odor threshold, estimated at only 16 ng L −1 in red wines. The proposed strategy is based on solid phase extraction and analysis by GC–MS. The detection limit value was 0.6 ng L −1, which is more than one order of magnitude below its odor threshold in wine. Matrix effects have not been found and a synthetic wine calibration was proposed. The precision of the method was evaluated in reproducibility terms, obtaining a very acceptable value (RSD 4%). The optimized and validated strategy was applied to quantify this molecule in thirty wines belonging to different varieties as Graciano, Maturana tinta, Schioppettino, Shiraz, Duras and Gamay. Two of these wines exhibited levels higher than 100 ng L −1 .