作者:Rachel C. Cooke、Dimitra L. Capone、Katryna A. van Leeuwen、Gordon M. Elsey、Mark A. Sefton
DOI:10.1021/jf8026974
日期:2009.1.28
Stable isotope dilution assays have been developed for γ-octalactone (1), γ-nonalactone (2), γ-decalactone (3) and γ-dodecalactone (4) in both white and red wines for the first time. 2H7-analogues of each lactone were prepared for use as internal standards via a strategy employing ring-opening, esterification and oxidation of the respective starting lactones. The methods were shown to be highly accurate
首次针对白葡萄酒和红葡萄酒中的γ-八内酯(1),γ-九内酯(2),γ-十内酯(3)和γ-十二内酯(4)开发了稳定的同位素稀释测定法。通过采用相应的起始内酯的开环,酯化和氧化的策略,制备每种内酯的2 H 7-类似物以用作内标。方法被证明是高度精确的和可再现的(- [R 2 ≥0.999; SD≤1%)。澳大利亚葡萄酒的一个大的选择(Ñ = 178)进行了分析内酯的存在1 - 4。分析了58种涵盖霞多丽,雷司令,长相思,赛美蓉和维奥涅尔等品种的白葡萄酒,以及葡萄孢属的葡萄酒,并广泛显示γ-八内酯(1)是最常见的内酯,超过了其极限值。在28种葡萄酒中检测到,随后在23种葡萄酒中检测到γ-壬内酯(2)。Botrytis型白葡萄酒的最高浓度为1和2(最大浓度分别为8.5和59μg/ L)。总共对120种红酒进行了研究,涵盖了赤霞珠,杜里夫,梅洛,黑比诺和设拉子等品种,并显示出γ-八内酯(1)和γ-九