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Decoding Long-Chain Fatty Acid Ethyl Esters during the Distillation of Strong Aroma-Type Baijiu and Exploring the Adsorption Mechanism with Magnetic Nanoparticles
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-09-12 , DOI: 10.1021/acs.jafc.4c05117 Siting Ye 1, 2, 3 , Xiaolong Shang 1, 2, 3 , Ling Ao 4 , Baoguo Sun 1, 2, 3 , Xiaoman Chen 1, 2, 3 , Cai-Hong Shen 4 , Miao Liu 4 , Feng Lin 4 , Wei Dong 1, 2, 3 , Xiaotao Sun 1, 2, 3 , Yanfei Xiong 4 , Bo Deng 4
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-09-12 , DOI: 10.1021/acs.jafc.4c05117 Siting Ye 1, 2, 3 , Xiaolong Shang 1, 2, 3 , Ling Ao 4 , Baoguo Sun 1, 2, 3 , Xiaoman Chen 1, 2, 3 , Cai-Hong Shen 4 , Miao Liu 4 , Feng Lin 4 , Wei Dong 1, 2, 3 , Xiaotao Sun 1, 2, 3 , Yanfei Xiong 4 , Bo Deng 4
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Simultaneous detection of the dynamic distribution of long-chain fatty acid ethyl esters (LCFAEEs) during Baijiu distillation is crucial for optimizing its flavor and health attributes. In this study, we synthesized a simple, cost-effective Fe3O4@NH2 adsorbent to simultaneously extract eight LCFAEEs from Baijiu. Through density functional theory and adsorption experiments, we elucidated 1,6-hexanediamine as a surface modifier, with the −NH2 groups providing adsorption sites for the LCFAEEs via hydrogen-bonding interactions and van der Waals forces. Additionally, we established the magnetic solid-phase extraction–GC–MS extraction technique combined with stable isotope dilution analysis to analyze LCFAEEs. This method revealed the dynamic distribution patterns of LCFAEEs during strong aroma-type Baijiu (SAB) distillation. We observed that the concentrations of the eight LCFAEEs gradually decreased with prolonged distillation and were significantly correlated with ethanol concentration. To ensure optimal flavor and clarity in SAB, it is recommended to select the heart-stage base Baijiu with an alcohol content of 58%–63%.
中文翻译：
浓香型白酒蒸馏过程中长链脂肪酸乙酯的解码及磁性纳米粒子吸附机制的探索
同时检测白酒蒸馏过程中长链脂肪酸乙酯 (LCFAEE) 的动态分布对于优化其风味和健康属性至关重要。在本研究中，我们合成了一种简单、经济高效的Fe 3 O 4 @NH 2吸附剂，可同时从白酒中提取八种LCFAEE。通过密度泛函理论和吸附实验，我们阐明了 1,6-己二胺作为表面改性剂，其中 -NH 2基团通过氢键相互作用和范德华力为 LCFAEE 提供吸附位点。此外，我们建立了磁性固相萃取-GC-MS萃取技术与稳定同位素稀释分析相结合来分析LCFAEE。该方法揭示了浓香型白酒（SAB）蒸馏过程中 LCFAEE 的动态分布模式。我们观察到，随着蒸馏时间的延长，八种 LCFAEE 的浓度逐渐降低，并且与乙醇浓度显着相关。为确保SAB的最佳风味和澄清度，建议选择酒精含量为58%~63%的心级基酒。
更新日期：2024-09-12
中文翻译：
浓香型白酒蒸馏过程中长链脂肪酸乙酯的解码及磁性纳米粒子吸附机制的探索
同时检测白酒蒸馏过程中长链脂肪酸乙酯 (LCFAEE) 的动态分布对于优化其风味和健康属性至关重要。在本研究中，我们合成了一种简单、经济高效的Fe 3 O 4 @NH 2吸附剂，可同时从白酒中提取八种LCFAEE。通过密度泛函理论和吸附实验，我们阐明了 1,6-己二胺作为表面改性剂，其中 -NH 2基团通过氢键相互作用和范德华力为 LCFAEE 提供吸附位点。此外，我们建立了磁性固相萃取-GC-MS萃取技术与稳定同位素稀释分析相结合来分析LCFAEE。该方法揭示了浓香型白酒（SAB）蒸馏过程中 LCFAEE 的动态分布模式。我们观察到，随着蒸馏时间的延长，八种 LCFAEE 的浓度逐渐降低，并且与乙醇浓度显着相关。为确保SAB的最佳风味和澄清度，建议选择酒精含量为58%~63%的心级基酒。
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