Table 1 Proteins for membrane calibration.

From: Effect of ionic liquid on formation of copolyimide ultrafiltration membranes with improved rejection of La3+

Protein

Molecular weight, g/mol

Stokes radius, Ã…

Vitamin B12

1360

7.8

Ovalbumin

44,000

28.6

Bovine serum albumin

67,000

34.0

γ-globuline

160,000

46.5

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