Abstract
This article presents a novel simulation study for improving the sensitivity of linear ion trap mass spectrometers used for sensing low sample concentrations in field applications. Commercial simulation software using the boundary element method has been used for modeling ion source lens system for externally created ions, which are then injected into a 2D linear ion trap mass analyzer operating in a non-scanning mode. The geometric parameters of the ion source lens system were varied to investigate the effects on ion trap sensitivity by altering the number of ions injected into the analyzer and their focus. The performance results are given for cocaine (m/z 182 and 304) ions, showing significant improvement in sensitivity when the optimized lens system is used.
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