HI,
The question is not clear.
Hope this is helpful. Keep smiling. Bye.How to calculate Percentage Recovery?
The question is not clear.
Are you after a method of determining to level of GHB in a drink?
I don't know a method (probably would be GC, HPLC based). But to calculate the % in the sample you would work out the the amount in the sample and dive by the total weight of sample expressed as a percentage.
Or are you after the amount of material that a test method recovers from a solution. To do this you would prepare a known concentrate of a solution of GHB. You would then analyse the solution via your chosen test method. Work out the amount of GHB recovered and express as a percentage of known added GHB in the sample.
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