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首页> 外文期刊>Journal of the Institute of Brewing >Determination of volatile compounds in Baijiu using simultaneous chromatographic analysis on two columns
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Determination of volatile compounds in Baijiu using simultaneous chromatographic analysis on two columns

机译：两列同时色谱分析使用同步色谱分析的百九挥发性化合物的测定

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摘要

Baijiu is a Chinese spirit which is produced by a complex process involving solid state fermentation with various raw materials and a consortium of microorganisms resulting in an abundance of fermentation by products. A method was developed for quantification of 62 compounds in Baijiu spirits using simultaneous direct injection to two columns (CPWax-57CB and DB-624). Dual column analysis substantially increased the reliability of identification using a flame ionisation detector. The method had high linearity - for all but one compound - indicated by the coefficient of determination (R-2) of = 0.999 (in a range of 0.3 - 260 mg/L) and reproducibility (for the majority of compounds at a concentration of ca. 1 mg/L, - 5% for the DB-624 columns and 8% for the CPWax-57CB column). The limit of detection was 1 mg/L for all compounds. The method was used to analyse volatile compounds in 38 samples of Baijiu, from different regions and flavour types. The main group of compounds in the volatile fraction were esters and higher alcohols. Based on Orthogonal Partial Least Squares Discriminant Analysis it was not possible to separate the samples in terms of region, but it was possible to distinguish between strong and soy sauce types of Baijiu from the other samples. (C) 2020 The Institute of Brewing & Distilling
机译：白九是一种中国精神，是由一种复杂的过程制作，涉及具有各种原料和微生物联盟的固态发酵，导致产品发酵丰富。使用同时直接喷射到两列（CPWAX-57CB和DB-624），开发了一种用于量化62种化合物的方法（CPWAX-57CB和DB-624）。双柱分析基本上增加了使用火焰电离检测器的识别可靠性。该方法具有高线性 - 除了一个化合物，除了一个化合物 - 由> = 0.999（0.3-260mg / L）和再现性的测定系数（R-2）表示（R-2）和浓度的大多数化合物Ca.1mg / L，-5％的DB-624柱和CPWAX-57CB柱的<8％）。所有化合物的检测极限为<1mg / L.该方法用于分析来自不同地区和风味的38个白九样品中的挥发性化合物。挥发性级分中的主要化合物是酯和高级醇。基于正交部分最小二乘判别分析，不可能将样品分离在区域方面，但是可以区分来自其他样品的强大和酱油类型的白冰。 （c）2020酿造和蒸馏研究所

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