摘要
金属有机框架(MOFs)材料CPL-1的比表面积大、孔径均一,在低温条件下对氢同位素具有良好的量子筛分效应,是气相色谱固定相潜在的应用材料。采用CPL-1填充制备了长0.5 m、内径1 mm的微孔填充柱,借助单晶Al_2O_3颗粒间隙构建了色谱载气流通路径,在低温条件下探索研究了CPL-1填充柱的氢同位素分析性能。结果表明,在77 K时CPL-1对H_2和D_2的吸附量接近4 mmol/g,优于MnCl2/γ-Al_2O_3和γ-Al_2O_3,CPL-1填充柱在取样量0.25~2 mL范围内对低浓度氢同位素样品的检测具有良好的线性关系,检测的相对误差小于4%。CPL-1填充柱具有线性范围宽、重复性好、准确度高等优点,在氢同位素色谱分析中具有潜在的应用价值。
CPL-1is a metal organic framework(MOF)with potential application as stationary phase material in gas chromatographic(GC)analysis,due to its large specific surface area,uniform pore size and good quantum sieving effect on hydrogen isotopes at low temperatures.Herein,a microporous column packed with CPL-1was used at cryogenic temperature(77K),and the column was1.0mm in inner diameter,0.5m in length.Single crystals of Al2O3was used to build flow path for chromatographic carrier gas.The results showed that the adsorption of H2and D2with CPL-1was4mmol/g at77K,which was better than MnCl2/r-Al2O3and r-Al2O3.With the injection volume increasing from0.25mL to2mL,the results showed good linear relationship,and the relative error was less than4%.The results indicated that the column packed with CPL-1has wide linear range,good repeatability and high accuracy,and it has potential use in hydrogen isotope analysis with gas chromatography.
作者
胡鹏
陈平
曹大伟
付小龙
肖成建
王和义
HU Peng;CHEN Ping;CAO Dawei;FU Xiaolong;XIAO Chengjian;WANG Heyi(Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China)
出处
《色谱》
CAS
CSCD
北大核心
2017年第10期1023-1027,共5页
Chinese Journal of Chromatography
基金
国家磁约束聚变能研究专项项目(2014GB111001
2014GB111004)~~
关键词
气相色谱
CPL-1填充柱
金属有机框架
氢同位素
氘氚燃料循环
gas chromatography ( GC)
CPL-1 packed column
metal organic frameworks ( MOFs)
hydrogen isotope
deuterium tritium fuel cycle
