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Recovery question

Gamewizard
in Homework Help

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Hi,

 

I am really stuck on this question, can someone please help me how to do it ?

 

A sample of plasma was assayed and the absorbance was found to be 0.35.

0.95ml of this sample was mixed with 0.05ml of the 100mmol/L urea solution and the mixture was assayed. The absorbance was found to be 0.45.

Calculate the recovery of the added urea and comment briefly.

 

Recovery = ?? %

 

 

 

Please help :(

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