‘Zone model’ as an explanation for signal behaviour and non-spectral interferences in inductively coupled plasma mass spectrometry
‘Zone model’ as an explanation for signal behaviour and non-spectral interferences in inductively coupled plasma mass spectrometry
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DOI：
10.1039/ja9930800433
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发表时间：
1993
影响因子：
3.4
通讯作者：
F. Vanhaecke;R. Dams;C. Vandecasteele
中科院分区：
文献类型：
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作者：
F. Vanhaecke;R. Dams;C. Vandecasteele
该区域模型是等离子体的简化表示，由VG PlasmaQuad PQ 1电感耦合等离子体（ICP）质谱仪（VG Elemental，Winsford，柴郡，英国）的优化研究结果得出。根据该模型，对于每个核素，在ICP的中央通道中存在一个区域，在该区域中发生单电荷离子的最大密度。这种最大M+密度的区域的位置是核素的质量数的函数，并且该区域可以在仪器参数的改变或不同基质的引入的影响下经历空间位移。这种表示不仅能够解释来自优化研究的大量观察结果，而且还允许理解为什么观察到基质诱导的信号抑制和增强，为什么对于给定的基质，信号强度每天改变的程度不同，以及为什么信号受基质影响的程度是质量的函数对应核素的编号。虽然区域模型可能不完全反映真实的物理现实在其所有方面，它提供了一个唯象模型的离子信号的变化与质量数，操作参数和矩阵组成。
The zone model is a simplified representation of the plasma, resulting from the findings of an optimization study for a VG PlasmaQuad PQ1 inductively coupled plasma (ICP) mass spectrometer (VG Elemental, Winsford, Cheshire, UK). According to this model, for every nuclide there is a zone in the central channel of the ICP, where a maximum density of singly charged ions occurs. The position of such a zone of maximum M+ density is a function of the mass number of the nuclide and the zone can undergo a spatial displacement under the influence of an alteration of an instrumental parameter or the introduction of a different matrix. This representation not only enables an explanation of a large number of observations from the optimization study, but also allows an understanding of why both matrix induced signal suppression and enhancement were observed, why for a given matrix the extent to which the signal intensities were altered differed from day to day and finally why the extent to which a signal is influenced by the matrix was seen to be a function of the mass number of the corresponding nuclide. Although the zone model might not completely reflect the genuine physical reality in all its facets, it provides a phenomenological model for the variation of ion signals with mass number, operating parameters and matrix composition.