TY - GEN
T1 - Modeling of hollow fiber membrane inlet mass spectrometry
AU - Janes, Dustin W.
AU - Durning, Christopher J.
AU - Van Pel, Derek M.
AU - Lynch, Michael S.
AU - Krogh, Erik T.
AU - Gill, Christopher G.
PY - 2007
Y1 - 2007
N2 - The main result of this work is to provide a simple, correct treatment of MIMS data to extract the physically meaningful parameters D and K. Interestingly, the general feature that D from short time analysis lies significantly below that from long time analysis suggests a weakly non-linear diffusion process in the systems examined, i.e. that D increases weakly with concentration under the conditions used here. Indeed from previous experiments, and from free-volume theory, D typically increases with concentration for low molar mass organic compounds in polymeric membranes [16,17]. We are currently exploring whether this feature can be quantitatively analyzed from MIMS data. Because mass spectrometers are highly selective it is possible to simultaneously study multiple analytes with subtle structural differences. Also, since selective membranes can largely or completely reject all but a narrow class of components in a sample, (e.g. designed to reject hydrophilic species, ionic species, particulates) MIMS can be used to directly analyze "native" or "dirty" samples. This makes possible advances for several important applications: 1) the reliable detection of trace, target contaminants in "native" samples, 2) the direct investigation of analyte permeation from multi-component mixtures, 3) the rapid, accurate, comprehensive study of the mass transfer properties of new membrane materials.
AB - The main result of this work is to provide a simple, correct treatment of MIMS data to extract the physically meaningful parameters D and K. Interestingly, the general feature that D from short time analysis lies significantly below that from long time analysis suggests a weakly non-linear diffusion process in the systems examined, i.e. that D increases weakly with concentration under the conditions used here. Indeed from previous experiments, and from free-volume theory, D typically increases with concentration for low molar mass organic compounds in polymeric membranes [16,17]. We are currently exploring whether this feature can be quantitatively analyzed from MIMS data. Because mass spectrometers are highly selective it is possible to simultaneously study multiple analytes with subtle structural differences. Also, since selective membranes can largely or completely reject all but a narrow class of components in a sample, (e.g. designed to reject hydrophilic species, ionic species, particulates) MIMS can be used to directly analyze "native" or "dirty" samples. This makes possible advances for several important applications: 1) the reliable detection of trace, target contaminants in "native" samples, 2) the direct investigation of analyte permeation from multi-component mixtures, 3) the rapid, accurate, comprehensive study of the mass transfer properties of new membrane materials.
UR - http://www.scopus.com/inward/record.url?scp=80053655742&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053655742&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:80053655742
SN - 9780816910229
T3 - AIChE Annual Meeting, Conference Proceedings
BT - 2007 AIChE Annual Meeting
T2 - 2007 AIChE Annual Meeting
Y2 - 4 November 2007 through 9 November 2007
ER -