基于质谱法的钯氢同位素效应研究

Studying on the Hydrogen Isotope Effect of Palladium by Mass-Spectrography

摘要:

钯因其较强的同位素效应而被广泛应用于氢同位素处理中,利用四级质谱对海绵钯的氕氘分离因子及其影响因素进行了系统研究,通过实验分析了-25 ℃~155 ℃范围内,不同氕氘相对丰度(5%~90%)、不同固相中的氢(氢同位素)钯比(0.05~0.7)对氕氘分离因子的影响。结合对α相中的氢氘分离因子计算表明：海绵钯的氢氘分离因子随温度的升高而降低,随氘丰度的增加而增加,在α+β及β相随氢同位素在固相中浓度的上升而有所增长,在α相则不受浓度的影响。

Abstract:

Palladium is widely used in hydrogen isotope technology owing to its obvious isotope effect, the systematic research of protium-deuterium seperation factor of sponge palladium was conducted by quadrupole mass spectrometer. The impact of temperatre (-25 ℃~155 ℃), protium-deuterium relative abundance (5%~90%), hydrogen-palladium ratio in the solid phase (0.05~0.7) on protium-deuterium seperation factor of sponge palladium was analyzed by experimental method. Combining the calculation of that in the a phase, the results show that protium-deuterium seperation factor of sponge palladium decreases with temperature, and increases with deuterium relative abundance. Protium-deuterium seperation factor increases with hydrogen-palladium ratio in the a+β and β phase, but such effect was not observed in the α phase.