poropakBNC²³⁶²¹³⁺¹ 例句 Also, the adsorbents in these concentrators need to be weak adsorbents such as Poropak Q for benzene so that the impurities are easily desorbed as the GC oven is heated. 而且，在这些浓缩器中的吸附剂必须是弱吸附剂例如对于苯采用泊帕克 Q，这样杂质在 GC加热室加热时容易解吸附。 pat365 For Poropak Q a concentration factor500 was obtained compared to a1 cc sample loop. 对于泊帕克 Q，相对于1毫升样品环管得到的浓缩因子为500。 pat365