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本文介绍一种真空紫外无极放电灯.这种光源可用于光离子化气相色谱仪、质谱仪等利用离子流测量物质的分析仪器.它由晶体窗口、玻璃壳、工作气体三部分组成.通过对LiF、MgF_2等晶体紫外透过性能以及H、He、Ar、Kr等气体放电特性的讨论,给出了提高共振辐射和延长使用寿命的基本原则.使用这种灯(Kr)的光离子化气相色谱仪,灵敏度为0.34A/g(苯),检出限为0.24pg(苯),均优于FID一个数量级.
This article describes a vacuum ultraviolet discharge lamp, which can be used for ionization gas chromatograph, mass spectrometer and other instruments that use ion current measurement material.It consists of crystal window, glass shell, working gas.Through the LiF, MgF 2 and other crystal UV transmission properties and H, He, Ar, Kr and other gas discharge characteristics of the discussion is given to improve the resonance radiation and extend the life of the basic principles of using this lamp (Kr) photochemical ionization of gas The chromatograph had a sensitivity of 0.34 A / g (benzene) and a limit of detection of 0.24 pg (benzene), all of which were superior to FID by an order of magnitude.