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Tandem mass spectrometry on a miniaturized laser desorption time-of-flight mass spectrometer

机译:小型激光解吸飞行时间质谱仪上的串联质谱

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Tandem mass spectrometry (MS/MS) is a powerful and widely-used technique for identifying the molecular structure of organic constituents of a complex sample. Application of MS/MS to the study of unknown planetary samples on a remote space mission would contribute to our understanding of the origin, evolution, and distribution of extraterrestrial organics in our solar system. Here we report on the realization of MS/MS on a miniaturized laser desorption time-of-flight mass spectrometer (LD-TOF-MS), which is one of the most promising instrument types for future planetary missions. This achievement relies on two critical components: a curved-field reflectron and a pulsed-pin ion gate. These enable use of the complementary post-source decay (PSD) and laser-assisted collision induced dissociation (L-CID) MS/MS methods on diverse measurement targets with only modest investment in instrument resources such as volume and weight. MS/MS spectra of selected molecular targets in various organic standards exhibit excellent agreement when compared with results from a commercial, laboratory-scale TOF instrument, demonstrating the potential of this powerful technique in space and planetary environments.
机译:串联质谱(MS / MS)是一种功能强大且广泛使用的技术,用于鉴定复杂样品中有机成分的分子结构。 MS / MS在远程太空任务中研究未知行星样本的应用将有助于我们了解太阳系中外星有机物的起源,演化和分布。在这里,我们报告在小型激光解吸飞行时间质谱仪(LD-TOF-MS)上实现MS / MS的情况,这是未来行星飞行任务中最有希望的仪器类型之一。该成就取决于两个关键组件:弯曲场反射器和脉冲引脚离子门。这些使互补的源后衰减(PSD)和激光辅助碰撞诱导解离(L-CID)MS / MS方法可用于多种测量目标,而对仪器资源(如体积和重量)的投入很少。与商用实验室规模TOF仪器的结果相比,各种有机标准物中所选分子靶标的MS / MS光谱显示出极好的一致性,证明了这种强大技术在太空和行星环境中的潜力。

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