Element
PES
0
[%]
PES
+
[%]
N
3.5
<0.5
O
15.7
21.9
C
77.2
74.5
S
3.7
3.6
Table 1:
Qualitative and quantitative composition of PES
0
and PES
+
membranes at a depth of 7 nm [8].
