[saqi78]

I need help for prediction of chemical reaction in crude oil at different temperature.
I am using cold finger device at different temperatures, and then checking the possible reactions at those temperatures, mainly reaction with metals.
In my view I shall analyse the product on GC, but is it a good idea?, I am not sure about it, can any one help me?

[nextpauling]

What is the reaction you're looking for?  Typically a cold finger is not used to carry out reactions...it's used to crystallize paraffin wax from the crude oil.  If you are in fact analyzing paraffin, you might have a tough time with GC since your sample must be vaporized.

[saqi78]

Yeah you are right that cold finger is used for crystallization purpose, but I want to check crude oils reaction with metals at 250 degree celcius and above, when I increase the temperature of the crude oil there should be some reaction due to catalytic activity of the metals or salts.
But the problem is that how I would analyse my product, I ll get some waxes on cold finger may be with some other products. To recognize the products should I use GC or GCMS or FTIR?

[nextpauling]

If possible, I would say use both GCMS and FTIR...GCMS will give you the molecular weigths of your products, and FTIR can give you a little more info on the functional groups and carbon chain if you're lucky.