近年来,离子探针二次离子质谱分析已经成为一种广泛应用的微分析技术。然而,同位素及其分子离子的质量干扰给二次离子质谱的定性定量解释造成困难。因此,认识分子离子的强度特征是十分重要的。同一元素各个同位素的单原子离子强度比是与其自然同位素丰度比一致的。但对于二原子以及多原子分子离子强度特征,则必须从这些分子离子形成的模式 In recent years, ion-probe secondary ion mass spectrometry has become a widely used microanalysis technique. However, the mass interference of isotopes and their molecular ions poses difficulties in the qualitative and quantitative interpretation of secondary ion mass spectrometry. Therefore, it is important to recognize the intensity characteristics of molecular ions. The monatomic ion intensity ratio for each isotope of the same element is consistent with its natural isotope abundance ratio. However, for the diatomic and polyatomic molecular ionic strength characteristics, the pattern that these molecular ions must form