• • On-site rapid detection relies on ion mobility spectrometry and electronic nose technology, while laboratory confirmation uses chromatography-mass spectrometry, achieving sensitivity down to ng·m−3 levels, critical for identifying clandestine labs and protecting first responders.
• • Monitored drug classes include heroin, amphetamine-type stimulants, cannabis, cocaine, synthetic cannabinoids, and fentanyl analogs, with concentrations spanning from a few ng·m−3 to several hundred µg·m−3, necessitating wide dynamic range in analytical methods.
• • Indoor drug concentrations are modulated by drug type, production/abuse methods, human activity intensity, and ventilation; for example, routine activities like walking or vacuuming can resuspend settled methamphetamine, increasing airborne levels, as shown by VanDyke et al.
• • Occupational exposure is a documented hazard: in a study of 240 law enforcement officers entering methamphetamine labs, 71% reported symptoms (headache, respiratory irritation, throat soreness, eye/skin irritation) despite 43% wearing respirators, underscoring the need for robust air monitoring to mitigate health risks.