Univ. Bordeaux, INRAE, Bordeaux INP, Bordeaux Sciences Agro, UMR 1366, OENO, ISVV, Villenave d'Ornon F-33140, France.
Univ. Bordeaux, INRAE, Bordeaux INP, Bordeaux Sciences Agro, UMR 1366, OENO, ISVV, Villenave d'Ornon F-33140, France.
Food Chem. 2023 Nov 15;426:136405. doi: 10.1016/j.foodchem.2023.136405. Epub 2023 May 23.
We report on the first evidence of a varietal origin of eugenol as a molecular marker in Baco blanc, one of the grape varieties used to produce Armagnac. Eugenol was identified and quantified by HS-SPME-GC-MS. For two separate vintages, the concentrations found in monovarietal wine spirits made from Baco blanc, were, on average, 10 times higher than those in other Vitis varieties, ranging from 31.0 to 174.7 µg/L. Investigations were carried out to quantify eugenol in the wines used for distillation, in the musts and finally in several parts of the plant. For all matrices over both vintages, it was confirmed that eugenol is much more abundant in Baco blanc than in Ugni blanc and Folle blanche. Moreover, enzymatic hydrolysis made it possible to release a significant quantity of eugenol from precursors, demonstrating that more than 90% of eugenol is bound in the must and in the grape berry pulp.
我们报告了丁香酚作为分子标记物在白科（Baco blanc）中的种源起源的首个证据，白科是用于生产雅文邑白兰地（Armagnac）的葡萄品种之一。通过 HS-SPME-GC-MS 鉴定和定量了丁香酚。在两个不同年份，从白科葡萄单品种酿造的白兰地酒中的浓度，平均比其他葡萄品种高 10 倍，范围从 31.0 到 174.7 µg/L。进行了调查以定量蒸馏用葡萄酒、葡萄汁以及植物的几个部位中的丁香酚。对于两个年份的所有基质，都证实丁香酚在白科葡萄中的含量远远高于白玉霓（Ugni blanc）和鸽笼白（Folle blanche）。此外，酶解使从前体中释放出大量丁香酚成为可能，这表明超过 90%的丁香酚结合在葡萄汁和葡萄浆果果肉中。
