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    • 1. 发明授权
    • Method for measuring trace quantity of oxygen in gas
    • 测量气体中微量氧气的方法
    • US5312761A
    • 1994-05-17
    • US674345
    • 1991-04-26
    • Takashi SuzukiKenkichi ItohHajime Sasaki
    • Takashi SuzukiKenkichi ItohHajime Sasaki
    • G01N21/76G01N21/77G01N31/00
    • G01N21/766Y10T436/207497Y10T436/209163Y10T436/25625
    • The present invention relates to a method and an apparatus for measuring trace quantity of oxygen in a gas by reacting yellow phosphorus vapor and oxygen in a sample gas, and measuring the intensity of the light emitted by the reaction. Together with the sample gas, a constant amount of oxygen is continuously supplied to a reaction chamber so as to react with the yellow phosphorus vapor, and the intensity of the light emitted is measured. The oxygen concentration in the sample gas is determined from the difference between the value measured as above and the intensity of the light emitted by the reaction between the yellow phosphorus vapor and the added oxygen, or from the oxygen concentration obtained from the measured value and the concentration of the added oxygen. The constant amount of oxygen to be added is supplied by supplying a constant amount of a preliminarily prepared oxygen-containing gas together with the sample gas or by providing an oxygen permeating membrane in the yellow phosphorus vapor supplying system so as to supply the oxygen by the permeation of the oxygen in atmosphere. The small amount of oxygen with a concentration of several ppb in the sample gas can be continuously measured with high precision.
    • PCT No.PCT / JP90 / 01083 Sec。 371日期:1991年4月26日 102(e)日期1991年4月26日PCT提交1990年8月27日PCT公布。 公开号WO91 / 03731 日本1991年3月21日。本发明涉及一种通过使样品气体中的黄磷蒸汽和氧气反应来测量气体中微量氧的方法和装置,并测量反应发射的光的强度。 与样品气体一起,将恒定量的氧气连续地供应到反应室,以便与黄磷蒸汽反应,并测量发射的光的强度。 样品气体中的氧浓度由上述测定值与黄磷蒸气与添加的氧之间的反应发射的光强度之差,或由测定值和 加入氧气的浓度。 通过与样品气体一起提供一定量的预先制备的含氧气体或通过在黄磷蒸气供应系统中提供氧气渗透膜来供应恒定量的氧,以便通过 氧气在大气中的渗透。 样品气体中少量浓度为几ppb的氧气可以以高精度连续测量。