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    • 8. 发明授权
    • Mass spectrometer
    • 质谱仪
    • US07199363B2
    • 2007-04-03
    • US10964791
    • 2004-10-14
    • Robert Harold BatemanJeffery Mark BrownDaniel James Kenny
    • Robert Harold BatemanJeffery Mark BrownDaniel James Kenny
    • B01D59/44H01J49/00
    • H01J49/405H01J49/0031
    • A mass spectrometer is disclosed comprising an ion source 4, a field free or drift region 5 and an ion mirror 7 comprising a reflectron. Metastable parent ions which spontaneously fragment by Post Source Decay whilst passing through the field free or drift region 5 are arranged to enter the ion mirror 7 and be reflected by the reflectron towards an ion detector 8 when the reflectron is maintained at a certain voltage. The process is then repeated with the reflectron being maintained at a slightly lower voltage. Two related sets of time of flight or mass spectral data are obtained for the two different voltage settings of the reflectron. From the two data sets the different times of flight for the same species of fragment ion can be determined. The mass to charge ratio of the parent ion which fragmented to produce the particular species of fragment ion can then be determined from the times of flight of the fragment ions.
    • 公开了一种质谱仪,其包括离子源4,无场或漂移区5以及包括反射镜的离子镜7。 当通过场自由或漂移区域5时通过后源衰变自发分裂的亚稳态亲本离子被布置成当反射器保持在一定电压时进入离子反射镜7并被反射器反射离子检测器8。 然后重复该过程,其中反射器保持在稍低的电压。 对于反射镜的两个不同的电压设置,获得两组相关的飞行时间或质谱数据。 从两个数据集可以确定相同种类的碎片离子的不同飞行时间。 然后可以从片段离子的飞行时间确定碎片化以产生特定种类的碎片离子的母体离子的质荷比。