5A和Rtx-WAX并联，分析CO，O2，CH4等气体，发现5A中，CO出峰位置可能比CH4提前了，求大神指点一下，[img=CO,690,517]https://ng1.17img.cn/bbsfiles/images/2018/09/201809272328459741_6711_3483081_3.jpg!w690x517.jpg[/img][img=O2+CH4,690,517]https://ng1.17img.cn/bbsfiles/images/2018/09/201809272328480033_9661_3483081_3.jpg!w690x517.jpg[/img][img=CH4+N2+air,690,517]https://ng1.17img.cn/bbsfiles/images/2018/09/201809272328508399_5763_3483081_3.jpg!w690x517.jpg[/img]这个现象怎么解释呢？