Subject: How can I measure ethanol content in fermenting fruit?

  I am working on a science fair project where fruit flies have shown a preference for 
peach over three other fermenting fruits. I am trying to determine what it is about peaches 
that they like. I know they eat yeast and ethanol off of fermenting fruit. I would like to see if 
I can measure how much ethanol each fruit produces after a few days. I could possibly 
have access to a lab with a centrifuge if that is needed.

Re: How can I measure ethanol content in fermenting fruit?