Method for measuring the concentration of water in argon, hydrogen, nitrogen and helium by ionization mobility spectrometry
    2.
    发明授权
    Method for measuring the concentration of water in argon, hydrogen, nitrogen and helium by ionization mobility spectrometry 失效
    通过电离迁移谱测量氩,氢,氮和氦中水分浓度的方法

    公开(公告)号:US06895339B2

    公开(公告)日:2005-05-17

    申请号:US10722190

    申请日:2003-11-25

    CPC分类号: G01N27/622

    摘要: A method is provided for measuring by ionization mobility spectrometry (IMS) relatively high concentrations of water in argon, hydrogen, nitrogen and/or helium, including the following steps: (a) introducing the gas to be analyzed into an IMS instrument with a counter-flow of pure gas; (b) obtaining a signal variable over time and proportional to the number of ions detected by an ion detector of the IMS instrument; (c) determining two time intervals (A, B) corresponding to the drift times in the IMS instrument of the H3O+ and (H2O)2+ ions; (d) obtaining the peaks of the signal in the two determined time intervals (A, B); and (e) calculating the water concentration in the gas to be analyzed according to the ratio between the intensity of the two peaks obtained in the signal.

    摘要翻译: 提供了一种用于通过电离移动光谱法(IMS)在氩气,氢气,氮气和/或氦气中相对高浓度的水进行测量的方法,包括以下步骤:(a)将待分析的气体引入具有计数器的IMS仪器 纯净气体流; (b)随时间获得信号变量并与由IMS仪器的离子检测器检测到的离子数成比例; (c)确定对应于IMS 3仪器中的漂移时间的两个时间间隔(A,B)和(H 2< 2> SUB> O)2 + + / - >离子; (d)在两个确定的时间间隔(A,B)中获得信号的峰值; 和(e)根据在信号中获得的两个峰的强度之间的比率计算待分析气体中的水分浓度。