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Oil & Water - the horrible mix

  1. Mar 28, 2008 #1
    I've been trying to determine the concentration of a vegie oil (0.9 g/mL) in dilute(~2,4 w%) oil-water emulsions that are badly aerated and with gas bubbles.

    I tried the density method, weighing the samples and then vacuum suck them to rid the bubbles - in order to get an accurate volume reading. But then I realized that water was vaporizing a little. and the dilute samples make the determination really hard.

    Is there a way that's fast and easy to do that? chromotography?

    Please help me... on my knees...
     
  2. jcsd
  3. Mar 28, 2008 #2

    chemisttree

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    Add THF or a mixture of ethyl acetate and ethanol to break the emulsion. The water should be easy to determine on the diluted sample using a Karl-Fisher titration.
     
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