公开(公告)号：US11920732B2

公开(公告)日：2024-03-05

申请号：US16806427

申请日：2020-03-02

申请人： Airgas, Inc. ,  American Air Liquide, Inc. ,  L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude

发明人： Tracey Jacksier ,  Mani C. Matthew ,  Richard A. Socki ,  Jun Sonobe ,  Megumi Isaji ,  James McHale

IPC分类号： F17C5/06 ,  F17C7/00 ,  F17C13/02 ,  G01N15/08 ,  G01N33/00

CPC分类号： F17C13/02 ,  F17C5/06 ,  F17C7/00 ,  G01N15/08 ,  G01N33/0004 ,  F17C2201/0104 ,  F17C2203/0639 ,  F17C2203/0646 ,  F17C2221/013 ,  F17C2250/0447 ,  G01N2015/0866 ,  G01N2033/0096

摘要： A quality control method for the preparation of dry compressed gas cylinder including passivating and/or preparing the compressed gas cylinder with the technique to be validated, filling the passivated/prepared compressed gas cylinder with gaseous carbon dioxide to a normal working pressure, wherein the gaseous carbon dioxide has a known δ18O isotope ratio, maintaining the pressurized gas cylinder at ambient temperature for a first predetermined period of time, and gradually emptying the pressurized gas cylinder, while simultaneously measuring the δ18O isotopic ratio, wherein a predetermined variation in the measured isotopic ratio of δ18O indicates a properly prepared cylinder.