[ RadSafe ] Liquid scintillation Standards

[franz.schoenhofer at chello.at]

Hi,

On my desk here at the University of Sevilla (Spain) stand three bottles of scintillation cocktails, received a few days ago. One of them - from PerkinElmer, which bought Packard - is made with xylene, the others with DIN (diisopropyl naphthalene). So the conclusion is, that xylene is still used. You may check the websites of PerkinElmer or Zinnser where you find information about the solvents used in cocktails. 

On the data sheets of the standards not only the activity is given, but also the chemical composition. 

Best regards,

Franz




---- "McKinnon schrieb:
> We have several old Packard liquid scintillation standards (H-3, C-14,
> blank) that require disposal.  Does anyone know if there was a date
> after which hazardous organics (toluene, xylene) were no longer used?  
> 
>  
> 
>  
> 
> Michael D. McKinnon, CHP, PE
> 
> Senior Scientist
> 
> Waste Generator Services
> 
> (702)295-1406
> 
>  
> 
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