Figure 1
The structure of the 'osmometer' is illustrated, which consists of an Ussing chamber with two compartments holding test solution and saline separately, two vertical tubes connected to each of two compartments and used as osmotic pressure indicators, a SAPL membrane, and test/saline solutions. The "membrane" is clamped between the two compartments of an Ussing chamber. The test solution in the right compartment is "dialyzed" against saline in the left compartment.