氦中痕量杂质气体气相色谱检测分析方法研究  

Analysis of Trace Impurity Components in Helium by Gas Chromatography

作　　者：杨丽玲[1] 杨洪广[1] 何长水[1] 赵崴巍[1] 刘正启 

机构地区：[1]中国原子能科学研究院,北京102413 [2]Gow-Mac仪器公司-中国区,北京100052

出　　处：《原子能科学技术》2012年第B09期120-125,共6页Atomic Energy Science and Technology

基　　金：国家ITER计划(国内配套研究)资助项目(2010GB113000)

摘　　要：为实现聚变堆氘氚燃料工艺气中痕量杂质气体组分的快速检测分析,需建立特殊的高精度在线气相色谱检测分析方法。以高纯氦作为载气,在不同的色谱柱温度和载气流速控制下,通过分子筛毛细管柱和PLOT-Q柱进行分离,采用放电氦离子化检测器(DID)进行检测,对氦中含量为1、10以及100ppm的杂质标准气体进行检测分析。结果表明:在柱温为40℃、流速为15～20mL/min实验条件下,分子筛柱在160s内能够实现H2、O2、N2、CH4和CO全部分离,且柱效较高,响应值的重复性较好,H2和O2之间的分离度高于1.5,实现了完全分离;在柱温为40℃、流速为20mL/min时,PLOT-Q柱分离CO2组分效果最佳。It＇s necessary to establish a high-precision analytical method of gas chromatography for achieving the rapid detection of trace impurity components in process gas of fusion reactors.The separation of impurities relied on capillary column of molecular sieve and PLOT-Q under different column temperature and the flow rate of carrier gas,respectively,with the impurity concentrations of 1,10 and 100 ppm in standard gas and the application of discharge ionization detector（DID） in high purity helium.The studies show that the separation of H2,O2,N2,CH4 and CO with the capillary column of molecular sieve achieves in 160 s with high column efficiency and good repeatability,while the column temperature is 40 ℃ and the flow rate is 15 mL/min to 20 mL/min,the resolution between H2 and O2 is more than 1.5,which can achieve complete separation.The experiment conditions with column temperature of 40 ℃ and the flow rate of 20 mL/min fit to separate CO2 with the column of PLOT-Q.

关 键 词：聚变堆 氘氚燃料 气相色谱 放电离子化检测器 杂质气体分析 

分 类 号：TL99[核科学技术—核技术及应用]