For school, I had to make an oil water separator. How can I test the purity of the water output (in terms of how much oil is in it). The only thing I can think of is to find its density and calculate its purity that way (closer it is to density of 1, the [...]

I am a student looking to build an oil water separator for a project, and am thinking I will use the vortex design, but I have a question. How do you get the oil out of it? I understand that the water will go to outside and create a cone, and that the water will [...]