I would suggest that you use vaccum de-air and break
with nitrogen at least three time before bubbling with
nitrgoen. Also, if you may be better off to remove
oxygen using CO2 instead of nitrogen.

Linsen Liu, Ph.D.


--- Juan José_Rodríguez Herrera <juan@...>
wrote:
> Dear all:
>
> I may need to deoxygenate solvents and some aqueous
> solutions to determine
> the conten o fhydroperoxides in my samples by
> purging with nitrogen.
> I have read that 30 min is suitable for volumes of
> 50-100 mL of some
> solvents. However, there are many factors affecting
> the removal of oxygen,
> and both the conssumption of nitrogen and the loss
> of solvents may be
> significant.
> Therefore, I am interestined in finding if there is
> any kinetic study
> concerning deoxygenation of different systems or
> alternatively if there any
> easy and cheap method to control the amount of
> residual oxygen that is left.
>
> Thanks in advance,
>
> Juan
>
> Juan José Rodríguez Herrera
> Dpto. Química y Tecnología de Productos Pesqueros
> (Dpt. of Chemistry and Technology of Fish Products)
> Instituto de Investigaciones Marinas
> (Institute of Marine Research)
> Consejo Superior de Investigaciones Científicas
> (C.S.I.C)
> 36208 VIGO
> ESPAÑA (SPAIN)
>
>
>


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