What's the deal with spiked recoveries on the DR103E QC?

Recoveries include absolute and relative recoveries. Absolute recovery examines the proportion of the drug that can be used for analysis after sample processing. This is because there is a certain amount of drug loss after sample processing, whether it is in the biological matrix or in the formulation excipients.

There are strictly two types of relative recoveries. One is the recovery test method and the other is the spiked sample recovery test method. The former is the addition of drugs in the blank matrix, the standard curve is also the same, this determination is used more, but there is a suspicion that the standard curve duplicate determination. The second is to add drugs in the known concentration of the sample, to and standard curve than the standard curve, the standard curve is also in the matrix with drugs.