Decker Trevor K, Tian Yuan, McClellan Joshua S, Bennett Linsey, Lammert Stephen A, Austin Daniel E, Hawkins Aaron R
Electrical and Computer Engineering Department, Brigham Young University, Provo, UT, 84602-0002, USA.
Henan Institute of Science and Technology, Xinxiang, Henan, 453003, China.
Rapid Commun Mass Spectrom. 2018 Feb 28;32(4):289-294. doi: 10.1002/rcm.8028.
Ion trap mass spectrometers are beneficial due to their intrinsic sensitivity and specificity. Therefore, a portable version for in situ analysis of various compounds is very attractive. Miniaturization of ion traps is paramount for the portability of such mass spectrometers.
We developed an optimized design for a planar linear ion trap mass spectrometer, consisting of two trapping plates with photolithographically patterned electrodes. Each plate is constructed using a machined glass substrate and standard microfabrication procedures. The plates are attached to a patterned circuit board via wire bonds then positioned approximately 5 mm apart.
Trapped ions are detected by ejecting them through tapered slits, which alleviate charge buildup. Mass analysis can be performed through either boundary or resonant ion ejection. Better than unit mass resolution is demonstrated with resonant ejection.
The optimized planar linear ion trap provides good resolution and the potential for further miniaturization. This was accomplished by vigorously testing variables associated with ion trap design including electrical connections, substrate materials, and electrode designs.
离子阱质谱仪因其固有的灵敏度和特异性而具有优势。因此，用于各种化合物原位分析的便携式版本非常有吸引力。离子阱的小型化对于此类质谱仪的便携性至关重要。
我们开发了一种用于平面线性离子阱质谱仪的优化设计，它由两个带有光刻图案化电极的捕获板组成。每个板使用加工过的玻璃基板和标准微加工工艺构建。这些板通过引线键合连接到图案化电路板，然后彼此相距约5毫米放置。
通过将捕获的离子通过锥形狭缝射出进行检测，这可减轻电荷积累。质量分析可通过边界或共振离子射出进行。共振射出显示出优于单位质量分辨率。
优化后的平面线性离子阱具有良好的分辨率以及进一步小型化的潜力。这是通过大力测试与离子阱设计相关的变量实现的，这些变量包括电气连接、基板材料和电极设计。
