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Why would adding resveratrol to cottonseed oil increase the peroxide value?

it's due to the structure of resveratrol
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experimental error
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Topic: Resveratrol as an Antioxidant  (Read 3285 times)

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Offline research123

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Resveratrol as an Antioxidant
« on: January 16, 2012, 04:57:34 PM »
I found the peroxide value of cottonseed oil by titration.  To find the antioxidizing abilities of resveratrol, I added that to the cottonseed oil.  The titration showed that the peroxide value increased from 110 to about 130.  I did the same method with BHT; BHT decreased the peroxide value of cottonseed oil from 110 to 28.  What would resveratrol, an antioxidant, increase the peroxide value?
Thank you
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Offline Polytriazole

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Re: Resveratrol as an Antioxidant
« Reply #1 on: January 16, 2012, 07:35:44 PM »
From what source did you get the resveratrol?  Are you certain of its purity?  I would first look for experimental error in a case like this.  Repeat the experiment, if you haven't already.  Then check the purity of your reagents.  Did you use cottonseed oil from the same batch in both tests? 

I apologize if it seems like I'm picking on obvious things, but in my experience the obvious is the problem 90% of the time.
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