WEF Discussion Forums : Laboratory Management and Technical Issues : Borate buffer solution for ammonia distillation Both EPA method and Standard Methods say to make up this solution by adding NaOH to a sodium tetraborate solution.

 

Is there a valid reason for making the sodium tet solution first rather than simply adding the 4.75 g of decahydrate directly to the 1L flask along with the NaOH?

 

 


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