种小型化的二级真空矩型离子阱质谱仪及其检测方法

• Format: Patent
• Language: Chinese
• Published: 09.02.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

种小型化的二级真空矩型离子阱质谱仪及其检测方法，所述的质谱仪包括两级真空腔:第级真空腔内包含大气压接口取样锥、四极杆和离子门电极，三者组成四极离子阱；第二级真空腔内包括矩形离子阱和离子检测器以及毛细管；两级真空腔之间设有离子光学元件。所述的检测方法包括控制级腔内的四极离子阱为储存离子阱模式和同步分析离子阱模式,可以提高质谱的灵敏度、降低定量限、提高分析通量，并降低空间电荷效应影响，提高分辨率。此处的四极杆不要求较高分辨，对加工精度要求不高，而且矩形阱加工装配简单，从而便于小型化，同时所述的检测方法可以保证良好的分析性能，在现场分析检测领域有广泛的应用前景。 The invention provides a small two-stage vacuum rectangular ion trap mass spectrometer and a detection method thereof. The mass spectrometer comprises two stages of vacuum cavities. The first-stage vacuum cavity is internally provided with an atmospheric pressure interface sampling cone, a quadrupole rod and an ion gate electrode which form a quadrupole ion trap. The second-stage vacuum cavity is internally provided with a rectangular ion trap, an ion detector and a capillary tube. An ion optical element is arranged between the two stages of vacuum cavities. The detection method includes the steps that the quadrupole ion trap in the first-stage cavity is controlled to be in an ion trap storage mode and an ion trap synchronous analys