A stable isotope dilution analysis (SIDA) was developed for the quantitative analysis of the health-promoting phytoalexin (E)-resveratrol in red wines by means of UPLC-QuanTOF-MS. After hemisynthetic preparation of (E)-3,5,4′-trihydroxy-2,4,6-trideuterostilbene ((E)-[2H3]-resveratrol) as the stable isotope labeled internal standard, validation experiments revealed recovery rate of 96.2 ± 0.8% RSD, thus demonstrating the robustness and accuracy of the SIDA-UPLC-QuanTOF-MS method. Repeatability and reproducibility expressed as RSD showed excellent values of 3.0% and 4.0% for (E)-[2H3]-resveratrol. Cross validation against a SIDA-HPLC-MS/MS analysis using a triple quadrupole mass spectrometer revealed comparable data, but the SIDA-UPLC-QuanTOF-MS was four times faster, thus making the latter method preferential for an accurate high-throughput analysis of wine samples. Comparison of the SIDA data to those obtained by quantitation using a standard addition method and external calibration, respectively, revealed 97.7% and 32.4% of the resveratrol concentration determined by means of SIDA-UPLC-QuanTOF-MS and 101.0% and 12.7% of the resveratrol levels found by using SIDA-HPLC-MS/MS.
采用
UPLC-QuanTOF-MS 方法,开发了一种稳定同位素稀释分析法(S
IDA),用于定量分析红葡萄酒中对人体健康有促进作用的植物
雌激素(E)-
白藜芦醇。以(E)-3,5,4′-三羟基-2,4,6-三
氘代
二苯乙烯((E)-[2H3]-
白藜芦醇)为稳定同位素标记内标,经半合成制备后,验证实验表明回收率为96.2 ± 0.8% R
SD,从而证明了S
IDA-
UPLC-QuanTOF-MS方法的稳健性和准确性。以 R
SD 表示的重复性和再现性显示,(E)-[2H3]-
白藜芦醇的重复性和再现性分别为 3.0% 和 4.0%。与使用三重四极杆质谱仪进行的 S
IDA-HPLC-MS/MS 分析进行交叉验证后,发现数据具有可比性,但 S
IDA-
UPLC-QuanTOF-MS 的分析速度是后者的四倍,因此后者更适于对葡萄酒样品进行准确的高通量分析。将 S
IDA 数据与使用标准添加法和外部校准法进行定量分析所获得的数据进行比较后发现,S
IDA-
UPLC-QuanTOF-MS 所测定的
白藜芦醇浓度分别为 97.7% 和 32.4%,S
IDA-HPLC-MS/MS 所测定的
白藜芦醇浓度分别为 101.0% 和 12.7%。