Instrumental conditions of secondary ion mass spectrometry that affect sensitivity for observation of very high masses.
Instrumental conditions of secondary ion mass spectrometry that affect sensitivity for observation of very high masses.
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影响极高质量观测灵敏度的二次离子质谱仪条件。
DOI：
10.1021/ac00297a055
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发表时间：
1986
影响因子：
7.4
通讯作者：
Aberth,W
中科院分区：
文献类型：
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作者：
Aberth,W
通过比较不同工作参数下获得的碘化铯团簇离子的质谱结果表明，加速电压、系统压力和初级束流能量等因素对高质量信号电流的影响程度大于低质量信号电流。测量结果表明，为了更有效地分析高质量化合物，应考虑这些参数。碘化铯在许多方面都是研究仪器对质谱质量影响的理想样品材料。样品光谱保持稳定并在几个小时内产生恒定幅度的峰值，从而可以对长期获得的光谱进行比较。此外，由于元素铯和碘以单一同位素形式出现并且相对较重，因此可以获得非常高质量的 (CsI)„Cs+ 或 (CsI)„T 簇峰。正簇离子 n= 122（m= 31853 道尔顿）(1)，以及最近的正簇离子
It Is demonstrated by comparing the mass spectra of cesium Iodide cluster ions obtained under different operating parameters that such factors as acceleration voltage, system pressure, and primary beam energy affect the high-mass signal current to a greater extent than that of the low mass. The measurements Imply that consideration should be given to these parameters for more effective analysisof high-mass compounds.Cesium iodide in many ways is an ideal sample material for investigating instrumental effects on the quality of mass spectra. The sample spectrum remains stable and produces constant-amplitude peaks for several hoursthus allowing comparison of spectra obtained over a long period. Also, since the elements cesium and iodine occur as single isotopes and are relatively heavy, cluster peaks of (CsI)„Cs+ or (CsI)„T can be obtained for very high mass. Positive cluster ions with n= 122 (m= 31853 daltons)(1), and more recently