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首页> 外文期刊>International journal of mass spectrometry >Collision efficiency in an electrospray source interfaced with a magnetic mass spectrometer
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Collision efficiency in an electrospray source interfaced with a magnetic mass spectrometer

机译：与电磁质谱仪对接的电喷雾源的碰撞效率

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摘要

The collision efficiency in two distinct areas of an electrospray ion source has been compared on the basis of diagnostic ion intensities related to the voltages applied on three different lenses. The dissociation of covalent or non-covalent bonds and the shift of the charge state distribution of multiple-charged protein ions were used as indicators of the internal energy amount acquired by collisional activation. The results show that, for a given voltage difference between two successive lenses on the ion beam axis, the more efficient collision-induced dissociation processes are observed after the skimmer and not before. Although the enhancement of the fragmentation rate by increasing the skimmer voltage could be accompanied by a loss of sensitivity, this procedure should be of interest for analytical purposes.
机译：基于与施加在三个不同透镜上的电压相关的诊断离子强度，对电喷雾离子源两个不同区域的碰撞效率进行了比较。共价键或非共价键的解离和多电荷蛋白离子的电荷状态分布的变化被用作通过碰撞活化获得的内部能量的指标。结果表明，对于离子束轴上两个连续透镜之间的给定电压差，在分离器之后而不是在分离器之前观察到更有效的碰撞诱导解离过程。尽管通过增加分离器电压来提高碎裂率可能会伴随灵敏度的下降，但是出于分析目的，该方法应该是有意义的。

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