TY - JOUR
T1 - A Simple Method for Estimating Effective Ion Source Residence Time
AU - Griffith, K. S.
AU - Gellene, Gregory I.
N1 - Funding Information:
the Oz/Ar samples. K.S.G. thanks the Henry Lute Foundation for graduate fellowship support during the portions of this investigation performed at the University of Notre Dame. Acknowledgment is made to the Donors of the Petroleum Research Fund administered by the American Chemical Society (PRF No. 22721-AC51 and to the National Science Foundation (Grant No. CHE90-24091) for their support of this work.
PY - 1993/10
Y1 - 1993/10
N2 - A method is presented that uses the well-understood O2/Ax ion-molecule reaction system to determine the effective ion source residence time of a chemical ionization source. The process consists of: (1) defining the kinetic system in terms of reactions, reaction rates, and ionization cross sections; (2) solving the differential equations that describe the time evolu-tion of the kinetic system, and (3) comparing the calculated results to experimentally measured relative ion intensities. These steps are repeated for a variety of 02/Ar sample ratios and inlet pressures. The method leads to a simple relationship between inlet pressure and effective ion source residence time, independent of the 02/Ar sample ratio.
AB - A method is presented that uses the well-understood O2/Ax ion-molecule reaction system to determine the effective ion source residence time of a chemical ionization source. The process consists of: (1) defining the kinetic system in terms of reactions, reaction rates, and ionization cross sections; (2) solving the differential equations that describe the time evolu-tion of the kinetic system, and (3) comparing the calculated results to experimentally measured relative ion intensities. These steps are repeated for a variety of 02/Ar sample ratios and inlet pressures. The method leads to a simple relationship between inlet pressure and effective ion source residence time, independent of the 02/Ar sample ratio.
UR - http://www.scopus.com/inward/record.url?scp=0010318986&partnerID=8YFLogxK
U2 - 10.1016/1044-0305(93)80036-X
DO - 10.1016/1044-0305(93)80036-X
M3 - Article
C2 - 24227463
AN - SCOPUS:0010318986
VL - 4
SP - 787
EP - 791
JO - Journal of the American Society for Mass Spectrometry
JF - Journal of the American Society for Mass Spectrometry
SN - 1044-0305
IS - 10
ER -