How Do I Calculate Percent Recovery?
Question by sweetheart8: How do I calculate percent recovery?
It is asking me to “Include physical data on the product (in your case, the TLC data) and the percent recovery” what we did was to extract caffeine and the final amount of caffeine after boiling the filtrate was 0.49g. How do I calculate its percent recovery?
Best answer:
Answer by Skip
Here I have to guess what your instructor wants.
You can’t really do a % recovery unless you know how much you started with,
and you don’t know how much caffeine was in your original sample of coffee or tea.
If your instructor really wants you to do a % recovery, then divide the amount you obtained (after thorough overnight drying) by the amount of coffee or tea you started with, and express the result as a percentage.
(That’s really not the right way to do it because the theoretical recovery should always be 100%,
and that’s not the case here where you’re extracting a small amount from a bunch of plant material. You don’t actually know what % of the caffeine you were able to get out, because you don’t know how much was in the original plant material.
So it’s a bad question.)
What do you think? Answer below!
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