[CathyTodd]

Hello everyone.

I need a help I'm looking for non polar and hardly (or slowly) volatile solvents... any idea? 

[discodermolide]

Hello everyone.

I need a help I'm looking for non polar and hardly (or slowly) volatile solvents... any idea? 

Toluene, xylene, decane, etc.
Look here
http://www.chemicalland21.com/arokorhi/info/SOLVENTS.htm

[CathyTodd]

Thank you for the answer. But toluene and xylene are high volatile solvents, right?

[discodermolide]

Thank you for the answer. But toluene and xylene are high volatile solvents, right?

High boiling, with a vapour pressure shown here:
http://en.wikipedia.org/wiki/Toluene_(data_page)#Vapor_pressure_of_liquid

and xylene here:

http://en.wikipedia.org/wiki/P-Xylene_(data_page)#Vapor_pressure_of_liquid

What do you mean by high volatile solvents?

[CathyTodd]

I would like to mix oil with solvent so I can decrease the refractive index...  and mixture should be stable 

[discodermolide]

I would like to mix oil with solvent so I can decrease the refractive index...  and mixture should be stable 

Try trans decalin:

http://en.wikipedia.org/wiki/Decalin

BPt. 187°C
not very volatile.

Cis decalin BPt. 196°C
not so volatile.

[CathyTodd]

I'll try it. Thank you very much