The data includes the validation parameters in terms of apparent recoveries, matrix effect, instrumental limits of detection and quantification, and instrumental linear range for teh determination of 40 abuse drugs in urine samples. This encompasses a total of 4 files: one for instrumental validation and three for method validation at 3 different levels of concentration. The availability of this data is necessary to analyse urine samples and determine the consumption of these drugs

MQL = method quantification limit MDL = method detection limit %Rapp = Apparent recovery %ME = matrix effect