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Modeling on Fragmentation of Clusters inside a Mass Spectrometer

机译:质谱仪内部簇碎片建模

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摘要

Atmospheric clusters are weakly bound and can fragment inside the measuring instruments, in particular, mass spectrometers. Since the clusters accelerate under electric fields, the fragmentation cannot be described in terms of rate constants under equilibrium conditions. Using basic statistical principles, we have developed a model for fragmentation of clusters moving under an external force. The model describes an energy transfer to the cluster internal modes caused by collisions with residual carrier gas molecules. As soon as enough energy is accumulated in the cluster internal modes, it can fragment. The model can be used for interpreting experimental measurements by atmospheric pressure interface mass spectrometers.
机译:大气簇弱束缚,测量仪器内部可以在测量仪器内部,特别是质谱仪。 由于群集在电场下加速,因此不能根据平衡条件下的速率常数描述碎片。 使用基本统计原则,我们开发了一种模型,用于在外力下移动的群体碎片。 该模型描述了通过与残留载气分子的碰撞引起的簇内部模式的能量转移。 一旦在群集内部模式中累积足够的能量,它就可以碎片。 该模型可用于通过大气压界面质谱仪来解释实验测量。

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