How much the requirement of percent recovery for validation method analysis sample from natural product?

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Gunawan Indrayanto

Hi, please read the following attachments, I do hope the journals can answer your questions, best regards

Ismail Adwibi

This too attachment could be helpful for your question. good luck

Paul Milham

To know a true recovery you need a reference material of certified composition. Recoveries of 'spikes' should typically be 90-110% if you are claiming a quantitative method. The spikes should be incorporated with the sample, not simply into the extract; although that is where one would usually start from and work 'backwards'.