Development of electrostatic‐induced charge detector for multiturn time‐of‐flight mass spectrometer
Development of electrostatic‐induced charge detector for multiturn time‐of‐flight mass spectrometer
复制标题
多圈飞行时间质谱仪静电感应电荷检测器的研制
DOI：
10.1002/jms.4892
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发表时间：
2022
影响因子：
2.3
通讯作者：
Yurimoto Hisayoshi
中科院分区：
文献类型：
--
作者：
Bajo Ken‐ichi;Aoki Jun;Ishihara Morio;Furuya Shizuho;Nishimura Masahiro;Yoshitake Miwa;Yurimoto Hisayoshi
为解决多圈飞行时间质谱仪（TOF-MS）中的超车问题，建立了自相关函数。该函数分析每个离子包的一圈特征周期，并从由多圈离子包组成的信号脉冲序列中导出质谱。为了探测离子脉冲序列，研制了一种新型的无损离子探测器，并将其安装在MULTUM - S II的多转轨道上。该检测器由静电感应电荷检测器、前置放大器和数字化仪组成。由于多匝TOF频谱的积累，静电噪声比单离子信号小。传统的TOF-MS离子探测器是在采集信号脉冲序列后进行操作的。将多转TOF谱与自相关函数进行卷积，得到质谱。卷积质谱对全氟三丁胺（PFTBA）气体样品的质量分辨能力（MRP）为28,200 atm/z69，质量精度为28 ppm。
We developed an autocorrelation function to resolve the overtaking problem in a multiturn time‐of‐flight mass spectrometer (TOF–MS). The function analyzes the characteristic period for one lap of each ion packet and derives a mass spectrum from a signal pulse train composed of multiturn ion packets. To detect the ion pulse train, a new nondestructive ion detector was developed and installed in the multiturn orbit of MULTUM‐S II. This detector is composed of an electrostatically induced charge detector, a preamplifier, and a digitizer. The electrostatic noises are smaller than the single‐ion signals owing to the accumulation of the multiturn TOF spectrum. The conventional ion detector of TOF–MS is operated after collecting the signal pulse train. The multiturn TOF spectrum was convolved with an autocorrelation function to derive the mass spectrum. The convolved mass spectrum performed a mass resolving power (MRP) of 28,200 atm/z69 and mass accuracy of 28 ppm for the perfluorotributylamine (PFTBA) gas sample.