The column was conditioned overnight at 180oC with a flow of nitrogen carrier gas. Operating conditions were:Oven temperature 100 or 130oC;Injection temperature 160 c;Nitrogen flow; 35ml/min;Hydrogen 28ml/min;Oxygen 100mL/min.

• 柱子用氮气作载气于180°C下吹扫过夜。操作条件为：炉温 100或130°C；进样口温度 160°C；氮气流速 35ml/min；氢气流速 28ml/min；氧气流速 100ml/min。