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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >A hand-portable digital linear ion trap mass spectrometer
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A hand-portable digital linear ion trap mass spectrometer

机译：便携式数字线性离子阱质谱仪

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摘要

A hand-portable digital linear ion trap mass spectrometer (DLIT-MS) has been developed for VOC analysis. It has a weight of 18 kg with dimensions of 49 cm x 39 cm x 16 cm, and consumes an average power of ca. 60 W. As a result of the introduction of a digital waveform, the DLIT-MS can be driven at a lower voltage (perpendicular to 100 V) to cover a mass range of 30-300 Th with a unit resolution. Compact electronics has been designed to control the DLIT-MS and record mass spectra. The mass drift was reduced after the improvement in electronics to stabilize the digital waveform voltage during the mass scan. Tandem mass spectrometry (MS) has been achieved by using digital asymmetric waveform isolation (DAWI), forward and reverse scan, and collision induced dissociation (CID). The isolation and CID efficiency for methyl salicylate were 83.9% and 81.3%, respectively. A novel buffer gas inlet system was designed to enhance the sensitivity and allow easy and safe use of the instrument. Limits of detection below 1 ppbv were obtained for several mixed gaseous samples.
机译：便携式数字线性离子阱质谱仪（DLIT-MS）已开发用于VOC分析。它的重量为18千克，尺寸为49厘米x 39厘米x 16厘米，消耗的平均功率约为1千克。 60W。由于引入了数字波形，因此可以以较低的电压（垂直于100 V）驱动DLIT-MS，以单位分辨率覆盖30-300 Th的质量范围。紧凑型电子设备设计用于控制DLIT-MS和记录质谱图。电子器件的改进使质量扫描过程中的数字波形电压稳定之后，质量漂移减小了。通过使用数字不对称波形隔离（DAWI），正向和反向扫描以及碰撞诱导解离（CID）实现了串联质谱（MS）。水杨酸甲酯的分离效率和CID效率分别为83.9％和81.3％。设计了一种新颖的缓冲气体入口系统，以提高灵敏度并允许轻松安全地使用该仪器。几种混合气态样品的检出限低于1 ppbv。

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