Abstract
The carbon monoxide content in a purified nitrogen gas is detected by a highly sensitive atmospheric pressure ionization (API) method. Although CO has the same molecular weight as N/sub 2/, its ionization potential is quite different. Most ion species produced from nitrogen disappear when 100 ppM of Kr is added to the sample gas, and only ions relating to CO ((CO)/sub 2//sup +/ and Kr/sup +/CO) can be successfully and selectively detected. Relation curves between CO concentration and (CO)/sub 2//sup +/, as well as Kr/sup +/CO ion intensities are obtained. The concentration of CO included in a purified nitrogen gas is estimated to be 110 ppB. The detection limit of Kr/sup +/CO ions in this system is determined by the interference from Kr/sup +/N/sub 2/ ions and is 15 ppB or less. 5 figures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
