摘要
本文论述了一种比玻璃纯化系统更具优点的稀有气体金属纯化系统和质谱分析系统,系统的静态真空16小时维持在10^(-7)托内。活性碳管在-195℃下将He、Ne与Ar有效地分离,以便Ne同位素的分析。用自制的金属大小球均匀分装稀释剂。质谱计的分辩能力105(峰高百分之五处),精度±2%。最小可检测限:He为1.3×10^(-5),Ar为8×10^(-5),Ne为9×10^(-5)。测得空气的^(40)Ar/^(36)Ar比值为296.05,~4He/^(40)Ar比值为1.94x10^(-4),~4He/^(20)Ne比值为0.167。该质谱分析系统可用于地质学、地震气体地球化学等的研究。
It deals with a new rare gases metal purification and mass spectrometer analysis line better than the glass line. The system static vaecum keeps at 10^(-7)torr for about 16 hours. It gets He, ve and Ar effective separation by a charcoal trap at a temperature of -195℃, so the line can be used to analyze Ne isotopes. Spike is sampled by our spike line system. The mass spectrometer has a resolution of about 105 at 5 percent of peak. The precision is within ±2%. The minimum range of system is: 1.3×10^(-5)for He, 9×10^(-5)for Ne, 8×10^(-5)for Ar. It gets rare gases isotopes ratios in air as follows: ^(40)Ar/ ^(36)Ar is 296.05, ~4He/ ^(40)Ar is 1.94 10^(-4), ~4He/ ^(20)Ne is 0.167. The mass spectrometer can be used for researches in geology, seismological gas geochemistry and so on.
出处
《质谱学报》
EI
CAS
CSCD
1992年第1期50-56,共7页
Journal of Chinese Mass Spectrometry Society
