Using PEG-20M/Chromosorb WAW DMCS as a fixed phase, 3,5-xylidine and impurities would have been separated by gas chromatography on packed column.

• 采用PEG-20M和Chromosorb WAW DMCS栽体组成的固定相；在填充拄上分离了3；5-二甲基苯 胺及其异构体杂质.