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引用次数: 6
摘要
讨论了FAB质谱法分析对流层云滴组成的可能性。作为大气水的模型，使用了广泛浓度范围内的硫酸水溶液(10−1 ÷ 10−6 M)。检测的参数包括:从工作样品溅射的正离子和负离子的强度及其对水相(H2SO4)或pH值的依赖关系。(H2SO4)aq的检出限为~ 10−5 M (pH≤5)。所研究溶液的质谱和热力学性质之间的相关性支持了所提出的方法对大气水中硫酸浓度定量测定的适用性。
AN APPLICATION OF FAB MASS SPECTROMETRY IN ANALYSIS OF A COMPOSITION OF ATMOSPHERIC WATER
ABSTRACT The possibilities of FAB mass spectrometry to analyze the composition of the tropospheric cloud droplets are discussed. As a model for atmospheric water, aqueous solutions of sulfuric acid over a wide range of concentrations were used (10−1 ÷ 10−6 M). The parameters examined were: intensity of positive and negative ions sputtered from the working samples and their dependencies on (H2SO4) or pH measured in aqueous phase. A detection limits of (H2SO4)aq was ∼10−5 M (pH ≤ 5). The correlation observed between the mass spectra and thermodynamic properties of the solutions studied supports the applicability of the proposed approach to quantitative determination of sulfuric acid concentration encountered in atmospheric water.
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