^(14)C取样方法及其研究  

EXPERIMENT RESEARCH ON SAMPLING TECHNIQUE AND ITS SYSTEM OF CARBON 14

作　　者：陈凌[1] 黄子瀚[1] 黄隆[1] 姚琬元[1] 吴峻 杨广利 刘迎一 

机构地区：[1]中国原子能科学研究院

出　　处：《辐射防护》1999年第2期94-101,共8页Radiation Protection

摘　　要：利用气相色谱仪检测ＣＯ２浓度，测量了不同条件下ＮａＯＨ溶液对ＣＯ２的瞬时捕集效率Ｅ，实验气体以流量１Ｌ／ｍｉｎ通过２００ｍＬ浓度为５ｍｏｌ／Ｌ的ＮａＯＨ溶液，使用多孔滤板、三孔和单鼓泡器时，Ｅ分别为９５％、７８％和７７％。用多孔滤板鼓泡器，气体流量为０．５、１．０、１．２和１．５Ｌ／ｍｉｎ时，Ｅ分别为９８％、９５％、９０％和８６％。当ＮａＯＨ溶液浓度从０．５～５ｍｏｌ／Ｌ以及体积从１００～２００ｍＬ变化时，Ｅ基本不变。但取样温度低于１５℃时，Ｅ有明显变化。本文还分析了瞬时捕集效率与累积捕集效率的关系。对ＣＯ、ＣＨ４、Ｃ２Ｈ６、Ｃ３Ｈ８和Ｃ４Ｈ１０的催化氧化效率也进行了研究。The instantaneous CO 2 removal efficiency ( E ) of NaOH solution at various conditions was measured by using Gas Chromatography. The air at flow rate of 1 liter/min passed through the scrubber filled with 200 mL of 5 mol/L NaOH. For the glass frits, three hole and one hole bubblers, E is 95%, 78% and 77%, respectively. E is measured by using the glass frits bubbler, at sampling flow rate of 0.5, 1.0, 1.2 and 1.5 liter/min, and E is 98%, 95%, 90% and 86% respectively. When the NaOH solution concentration ranges from 0.5 to 5 mol/L and volume from 100 to 200 mL, E is almost the same. However, E will apparently change when the temperature is less than 15 ℃. In addition, we have analyzed the relation between E and the accumulated CO 2 removal efficiency ( E′ ), and determined the catalytic efficiencies combustion of CO, CH 4, C 2H 6, C 3H 8 and C 4H 10 . (

关 键 词：碳14 取样 捕集效率 气相色谱仪 辐射监测 

分 类 号：O613.71[理学—无机化学] X837[理学—化学]