CAJ | 학술논문

采用静态顶空与气相色谱质谱联用技术相结合建立了一种快速定量分析白酒中双乙酰含量的方法。通过优化确定了方法的最佳分析条件：目标白酒样品酒精度稀释至26%vol，加入适量 NaCl 过饱和，70℃恒温加热20 min 后吸取顶空气体于气相色谱质谱联用仪中进行分析。结果表明，该方法检出限低于20μg/L，5种不同香型白酒及模拟白酒的双乙酰回收率为87.1%～108.3%，RSD 为0%～10.7%，方法具有良好的准确性和精密度，适用于白酒中双乙酰的定量分析。
채용정태정공여기상색보질보련용기술상결합건립료일충쾌속정량분석백주중쌍을선함량적방법。통과우화학정료방법적최가분석조건：목표백주양품주정도희석지26%vol，가입괄량 NaCl 과포화，70℃항온가열20 min 후흡취정공기체우기상색보질보련용의중진행분석。결과표명，해방법검출한저우20μg/L，5충불동향형백주급모의백주적쌍을선회수솔위87.1%～108.3%，RSD 위0%～10.7%，방법구유량호적준학성화정밀도，괄용우백주중쌍을선적정량분석。
A rapid method for quantitative analysis of diacetyl content in Baijiu(liquor) by using static headspace coupled with GC-MS was intro-duced. The best analytical conditions were obtained through the optimization as follows: firstly, alcohol content of liquor sample diluted to 26 %vol, then the solution supersaturated with NaCl, after 20-minute heating at a constant temperature of 70 ℃ , the upper gas was analyzed by GC-MS. Such method displayed good accuracy and high precision, LOD was below 20 μg/L, and diacetyl recoveries of 5 liquor samples of differ-ent flavor type and of simulated liquor was between 87.1 %~ 108.3 %, and RSD was 0 %~ 10.7 %. Such method was suitable for quantitative analysis of diacetyl content in Baijiu(liquor).