Demand for clean water is ever-increasing.  Reverse Osmosis membranes are used to remove ions and are produced by interfacial polymerization.  Although they are used, the dynamics of creation is still a mystery.  Our research objectives are to measure reaction kinetics to connect input chemistry with membrane properties and performance, with the ultimate goal of creating longer lasting and more efficient membranes.  Interferometry, light transmitted through semi-reflective surfaces while tracking wavelength peaks, will be used to measure concentration gradients during membrane formation.  Microfluidic devices were utilized to track these changes.  The devices require mirrored surfaces about 100 microns apart, a stable planer interface, no fluid flow during the reaction, and materials that are compatible with oil/water and reactants.  We initially focused on delving into data collection with a standard microfluidics device using interferometry, but device failure refocused out efforts towards reengineering devices.  The standard device turned out to have a water soluble membrane the swelled to increase channel depth, which nullified the concentration readings. This gave us valuable insight into the iterative process and pushed us to rethink how devices can be made.