Forensic analysis plays a crucial role in a drug case. Forensic scientists employ a range of techniques to identify the type and amount of a drug that was seized as evidence, including the following:nChromatography: This is a separation technique used to identify and measure the presence of drugs. The most common chromatography techniques include gas chromatography (GC) and high-performance liquid chromatography (HPLC).nMass spectrometry: This is considered the gold standard in forensic drug analysis. This technique involves measuring the precise molecular mass of ions based on their mass-to-charge ratio. This process can be applied to the vast majority of drugs.nInfrared spectroscopy: This process uses infrared light to identify a chemical substance in solid, liquid, or gaseous forms.