I'm working on liquid-liquid extraction for fat-soluble multivitamin in pharma supplement. What percentage of recovery that is still acceptable and what's the guide ?
Hi you can refer to pharmacopoeia, some may differ from each other but most of the time the recovery range from 90% to 110% or at least 95%. I don't have one with me when I'm writing this comment so I'm not sure whether there is a chapter for multivitamin product, but I can recommend you search for individual vitamin chapter in pharmacopoeia to get the an idea the limit for recovery for each vitamin (if multivitamin chapter is not available).
Besides that you have to know what level is the concentration of vitamin in your product as recovery percentage required may differ base on the concentration of vitamin in your product.
It is best that you start with United State Pharmacopoeia or British Pharmacopoeia as both are more widely accepted.