论文部分内容阅读
使用Cr2O3改性后的γ-Al2O3微填充色谱柱,分析了He、H2、HD、D2混合气体。结果表明,经改性后的γ-Al2O3柱对氢同位素分析的谱图在峰型、保留时间、柱效等方面明显优于未经改性的γ-Al2O3柱。在柱温77.4 K、氖载气流速30 mL/min、进样量5～100μL条件下,氢同位素各组分线性关系良好,谱峰对称,H2、HD的分离度可达0.84,HD、D2的分离度可达1.74,H2、HD和D2组分的保留时间分别为1.07、1.36和2.26 min,RSD<3%。预计用于分析氕、氘、氚三元混合气体时,一次分析时间在4 min内。
The mixed gases of He, H2, HD and D2 were analyzed by γ-Al2O3 micro-packed column modified with Cr2O3. The results show that the hydrogen isotope analysis of the modified γ-Al2O3 column is better than the unmodified γ-Al2O3 column in terms of peak shape, retention time and column efficiency. Under the conditions of 77.4 K at the column temperature, 30 mL / min neon carrier gas flow rate and 5 ~ 100 μL injection volume, the hydrogen isotopes showed good linearity and peak spectral symmetry with resolution of 0.84, HD, D2 The resolution was up to 1.74. The retention times of H2, HD and D2 fractions were 1.07, 1.36 and 2.26 min, respectively, with a RSD <3%. Expected for the analysis of 氕, deuterium, tritium ternary mixed gas, an analysis of time within 4 min.