Profiling of heroin and assignment of provenance by 87Sr/86Sr isotope ratio analysis
Keywords: هروئین; SA; South America*; SEA; Southeast Asia*; SWA; Southwest Asia*; MEX-SA; Mexico*; MC-ICP-MS; multi-collector inductively-coupled plasma mass spectrometry; NIST; National Institute of Standards and Testing; SRM; standard reference material; DEA; Drug Enforc