摘要
针对氦气与氢同位素气体热导性差异较小的问题,以氧化锆原电池为气相色谱检测器、改性γ-Al_2O_3为填充柱,在液氮温度(77K)下系统研究了氧化锆检测器测量氢同位素的影响因素,对氦气中微量氢同位素气体进行了分离测试。结果表明,氧化锆检测器的最佳工作温度约为700℃,在载气流速为60mL/min条件下,仪器测量的相对标准偏差小于1%,该方法对H2的检测下限可达15ppm,对D2的检测下限可达40ppm,样品检测的相对误差小于5%。以上结果表明,氧化锆检测器可用于氦气中微量氢同位素的分析测量。
The differences between the thermal conduetivities of helium gas and hydro- gen isotope gas are very small. Applying zirconia primary battery as the detector of gas chromatography and modified γ-Al2O3 as the filled column, the influencing factors of the measurement of hydrogen isotopes by zirconia detector were studied systemically at liquid nitrogen temperature （77 K）. The separation test of trace hydrogen isotopes in the helium gas was also performed. The results show that the optimal working tempera- ture of zireonia detector is about 700 ℃. Under the condition that the flow rate of the purge gas is 60 mL/min, the relative standard deviation of the instrument measurement is smaller than 1%, the detection limits of H2 and D2 are 15 ppm and 40 ppm, respec-tively, and the relative error is smaller than 5%. The above results indicate that zirconia detector can be used for the measurement of trace hydrogen isotopes in helium gas.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2017年第4期603-608,共6页
Atomic Energy Science and Technology
基金
国家磁约束聚变能研究专项资助项目(2014GB11004)
关键词
氢同位素
氧化锆
色谱分析
氘氚燃料循环
hydrogen isotope
zireonia
chromatography analysis
deuterium tuitium fuel cycle
