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Table 6 EDX data for PEI membranes prepared from NMP and GBL

From: Preparation of polyetherimide membrane from non-toxic solvents for the separation of hydrogen from methane

Sample PEI wt% Carbon wt% Oxygen wt%
NMP-23 23 84.8 15.2
NMP-27 27 84.9 15.1
GBL-23 23 84.9 15.1
GBL-27 27 84.6 15.4