白酒气相色谱分析方法及误差分析

Gas Chromatography Methods of Liquor and the Error Analysis

白酒气相色谱分析法主要有外标法、归一化法和内标法3种,数据处理主要使用色谱数据处理机或色谱工作站自动计算。主要酯类物质的测定宜用外标法;醇、醛、酯的测定宜用内标法;微量成分的定量分析宜用双内标法;单体香精香料的分析宜用归一化法。降低消除气相色谱误差的方法有:过滤净化载气、定期更换硅橡胶垫、调整氢气流速、准确进样、控制点火条件、准确校正因子、进样速度适宜、合理调节输出信号的衰减、定期老化色谱柱、定期清理色谱柱头、正确配制和使用标样及内标物。(孙悟)

The gas chromatography methods of liquor mainly include external standard method, normalized method, and internal standard method. Data are processed mainly by chromatography data processing machine or chromatography working station. External standard method is preferred in the measurement of main ester substances, internal standard method is preferred in the determination of alcohols, aldehydes and esters, double internal standard method is preferred in quantitative analysis of microconstituents, and normalized method is preferred in the analysis of elementary flavoring substance. The solutions to reduce chromatography errors covere filtration and purification of carrier gas, periodical check and replace of silicon rubber pad, adjustment of hydrogen flow rate, accurate sample injection, control on firing conditions, accuracy of correction factor, appropriate sample injection rate, adequate regulation of output signal attenuation, periodical chromatographic column aging, periodical cleaning of chromatographic column head, and proper preparation and application of standard samples and internal standard substance. （Tran. by YUE Yang）