摘要
文章介绍了离子质谱计的原理及应用范围。由快原子枪装备的一台低价小型双聚焦质谱计用于离子的同位素丰度分析,微克级氮的同位素测量精度为1.5％。列举了一些应用实例,如用^(15)N、^(10)B和^(42)Ca、^(44)Ca作示踪剂研究生物学过程。
A low cost miniature double focusing mass spectrometer fitted with a fast atom gun was devised. The instrument is intended to perform isotopic ratio analysis of ions. A description of the principles and applications is given. A precision of 1. 5% was obtained for microgram samples of nitrogen. Some applications are exemplified, among them are the use of 15N, 10B and 42Ca, 44Ca as tracers in the study of bioligical processes.
