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. 2023 Jul 27;9(8):e18760. doi: 10.1016/j.heliyon.2023.e18760

Table 5.

FTIR characteristic bands of all the PES membranes.

Wavenumber (cm⁻¹)	3304.68	2971.19	1411.04	1025.78	1070.87	3657.94	fingerprint region
I	✓	–	✓	–	–	–	✓
II	–	✓	✓	✓	–	✓	✓
IV	–	✓	✓	✓	✓	✓	✓
III	–	✓	✓	✓	–	✓	✓
V	–	✓	✓	✓	✓	✓	✓