How can I accurately measure the density and volume of microdroplets in oil?

[Pagowen]

I need to measure the density of aqueous microdroplets in oil. My first idea was to obtain a set volume of the droplet-in-oil mixture and weigh it to obtain the density, weigh the same volume of oil without droplets, then estimate the volume of the droplets so I can work out their density.

Estimating the volume of the droplets is turning out to be trickier than expected.

Does anyone have any ideas as to how I can measure the density and / or volume of microdroplets in oil?

Thank you

 

[mfb]

How large are the droplets (rough estimate)?

Can you take a small (known) volume and squeeze it between two transparent plates to make the droplets countable with a microscope?

 

[nasu]

Or maybe you could centrifuge the oil to make the droplets go on the surface. But it all depends on the size. mfb already asked.