To establish the identity of a controlled drug, NPS, precursor or chemical, whether in a seized drug sample or a biological matrix, the analytical approach must entail the determination of at least two uncorrelated parameters, one of which should provide information on the chemical structure of the analyte (e.g., infra-red spectroscopy, mass spectrometry). 

A reliable and scientifically supported identification of a drug or chemical depends on the use of an appropriate analytical scheme by competent analysts in a quality-controlled process.