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首页> 外文期刊>Journal of the American Society for Mass Spectrometry >Distance-of-Flight Mass Spectrometry with IonCCD Detection and an Inductively Coupled Plasma Source
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Distance-of-Flight Mass Spectrometry with IonCCD Detection and an Inductively Coupled Plasma Source

机译：具有IonCCD检测和电感耦合等离子体源的飞行距离质谱

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Distance-of-flight mass spectrometry (DOFMS) is demonstrated for the first time with a commercially available ion detector-the IonCCD camera. Because DOFMS is a velocity-based MS technique that provides spatially dispersive, simultaneous mass spectrometry, a position-sensitive ion detector is needed for mass-spectral collection. The IonCCD camera is a 5.1-cm long, 1-D array that is capable of simultaneous, multichannel ion detection along a focal plane, which makes it an attractive option for DOFMS. In the current study, the IonCCD camera is evaluated for DOFMS with an inductively coupled plasma (ICP) ionization source over a relatively short field-free mass-separation distance of 25.3-30.4 cm. The combination of ICP-DOFMS and the IonCCD detector results in a mass-spectral resolving power (FWHM) of approximately 900 and isotope-ratio precision equivalent to or slightly better than current ICP-TOFMS systems. The measured isotope-ratio precision in % relative standard deviation (%RSD) was a parts per thousand yen0.008%RSD for nonconsecutive isotopes at 10-ppm concentration (near the ion-signal saturation point) and a parts per thousand yen0.02%RSD for all isotopes at 1-ppm. Results of DOFMS with the IonCCD camera are also compared with those of two previously characterized detection setups.
机译：飞行距离质谱仪（DOFMS）首次用市售离子检测仪-IonCCD相机进行了演示。由于DOFMS是基于速度的MS技术，可提供空间分散的同时质谱分析，因此需要位置敏感离子检测器来进行质谱收集。 IonCCD相机是一个5.1厘米长的1-D阵列，能够沿着焦平面同时进行多通道离子检测，这使其成为DOFMS的有吸引力的选择。在当前的研究中，在25.3-30.4 cm的相对短的无场质量分离距离上，对IonCCD相机的DOFMS进行了电感耦合等离子体（ICP）电离源评估。 ICP-DOFMS和IonCCD检测器的组合可产生约900的质谱分辨力（FWHM），其同位素比精度与目前的ICP-TOFMS系统相当或稍高。相对于10ppm浓度的非连续同位素（接近离子信号饱和点），相对于标准偏差的百分数（％RSD）的测量同位素比率精度为0.008％RSD和千分之0.02 1-ppm下所有同位素的％RSD。还将使用IonCCD相机的DOFMS结果与两个先前表征的检测设置的结果进行了比较。

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