Samples pretreatment and analytical techniques are the key to study trace components in Baijiu. Chemical assay, paper chromatography,thin layer chromatography or chromatography, gas chromatography, GC-MS and two-dimensional GC-MS analysis techniques were successively applied on the detection and analysis of aroma components in Baijiu. The sample pretreatment methods compatible with analytical techniques was simultaneously innovated and developed, including dynamic headspace, liquid-liquid extraction, solid-...