IMS Instrumentation I: Isolated data acquisition for ion mobility spectrometers with grounded ion sources
IMS Instrumentation I: Isolated data acquisition for ion mobility spectrometers with grounded ion sources
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DOI：
10.1007/s12127-020-00260-5
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发表时间：
2020-05-07
影响因子：
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通讯作者：
Zimmermann, Stefan
中科院分区：
文献类型：
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作者：
Lippmann, Martin;Kirk, Ansgar T.;Zimmermann, Stefan
操作离子迁移谱仪所需的漂移电压意味着离子源或检测器的高压隔离。通常，由于小离子电流对干扰的敏感性，因此检测器接地，因此对信号完整性的要求比离子源更高。然而，对于某些离子源，例如非放射性电子发射器或电喷雾电离源，或用于与其它仪器耦合，例如气相色谱仪或液相色谱仪，接地离子源是有益的。在本文中，我们提出了一个隔离的数据采集接口，使用16位，每秒250千样本的模拟数字转换器和光纤发送器和接收器。与接地检测器相比，通过这种新的数据采集接口和接地离子源记录的所有光谱都显示出相同的峰形和噪声，从而在设计上具有额外的自由度。
The drift voltage required for operating ion mobility spectrometers implies high voltage isolation of either the ion source or the detector. Typically, the detector is grounded due to the sensitivity of the small ion currents to interferences and thus higher requirements for signal integrity than the ion source. However, for certain ion sources, such as non-radioactive electron emitters or electrospray ionization sources, or for coupling with other instruments, such as gas or liquid chromatographs, a grounded ion source is beneficial. In this paper, we present an isolated data acquisition interface using a 16 bit, 250 kilosamples per second analog to digital converter and fiber optic transmitters and receivers. All spectra recorded via this new data acquisition interface and with a grounded ion source show the same peak shapes and noise when compared with a grounded detector, allowing additional freedom in design.