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- Posts: 77
- Joined: Thu Sep 22, 2011 5:02 pm
I have recently performed a Liquid Liquid Extraction with good recovery. To determine the recovery I used the average recovery values from three replicate extractions at the same concentrations. I then took the standard deviation of these 3, and I found my numbers to be around 75% Absolute recovery +/- ~10-15 as the standard deviation.
My question is simple. I am quite happy with my analytical recovery. The only question is about the standard deviation for recovery of the replicate extracts.
What is the acceptable standard deviation limits for recovery? Also, are there any guidelines from the FDA or any other resources analytical resource?
-Many Thanks!