痕量全氟二甲基环丁烷在Carboxen-569上的穿透特性  

Penetration Capacity of Trace Perfluorodimethylcyclobutane Through Carboxen-569 Adsorbent

作　　者：羊衍秋[1] 何静波[1] 叶仕有[1] 杨通在[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《原子能科学技术》2005年第5期404-408,共5页Atomic Energy Science and Technology

摘　　要：借助气相色谱基本原理,实验测定了全氟二甲基环丁烷大气示踪剂通过Carboxen-569碳分子筛吸附管的穿透体积和大气样品采集的安全采样体积。结果表明:示踪剂的穿透体积(VB)与温度(t)满足lgVB=4.525-0.041 2t关系,而与流动相的流速(F)变化(F≤1 500 mL/min)基本无关;示踪剂样品安全采样体积(VS)与采样温度的关系为lgVS=4.551-0.061 6t(F=1 000 mL/min),与流动相流速的关系为lgVS=2.195-2.449×10-4F(t=40℃)。常温采样时,示踪剂的采样损失可以忽略。On the basic principle of the gas chromatograph, the penetration volume and the safe sampling volume of perfluorodimethylcyclobutane（PDCB） tracer in atmosphere through Carboxen-569 adsorption tube were tested. The results show that the relation of penetration volume（VB） and the adsorption temperature（t） is lgVB =4. 525-0. 041 2t, and VB is almost unchanged with the flux of mobile phase; the relation of safe sampling volume（Vs） of PDCB tracer in atmosphere and temperature and the flux of mobile phase are lgVs=4. 551-0. 061 6t （F=1000 mL/min） and lgVs=2.195-2.449X 10 4F （t=40℃）. When it was sampled under normal temperature, the loss of tracer PDCB should be neglected.

关 键 词：全氟二甲基环丁烷 示踪技术 样品采集 穿透体积 安全采样体积 

分 类 号：TQ131.11[化学工程—无机化工] TL913[核科学技术—核技术及应用]