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ORAC assay - Hydrophobic Powder Dissolving Problems - (Jul/12/2012 )

Hey All,

I am running an ORAC (oxygen radical absorbance capacity) assay and I'm having some problems.

I have a hydrophobic powder that I want to test but it has to be in solution to do so... and it will not go into solution. I have tried Acetone, Methanol, and Chloroform with no luck. It falls out of solution almost immediately after mixing. I have attempted some heating and on a rocker plate for 1 hour. When the movement stops, it falls out and the heating didn't seem to change much.

Can anyone give me some tips on a better solvent to use or ORAC advice in general?

Thank you,



Perhaps an oil and/or a surfactant then?


I could try that but I think don't think the reader would pick anything. The whole system is aquesous. Thank you though. I'm going to give it a try...


How about DMSO or DMF?