Practice

Forensic Chemistry: Drugs of Abuse and Narcotics Analysis

This mock covers the chemistry, analysis and statutory framework of drugs of abuse as it appears in the FACT Forensic Chemistry II syllabus, the NFSU MSc Forensic Science papers, and the UGC-NET Forensic Science Paper II. Thirty medium-difficulty questions across the presumptive (colour) tests an analyst runs at the bench — Marquis (opiates and amphetamine-type stimulants), Mecke and Mandelin (the four-colour alkaloid panel), Simon's reagent (primary vs secondary amine, amphetamine vs methamphetamine), Dille-Koppanyi (barbiturates), Duquenois-Levine (cannabis with its known false positives in patchouli, oregano, mace and nutmeg), and the cobalt-thiocyanate / Scott's three-stage test (cocaine and crack) — plus the microcrystalline tests for cocaine and the opium alkaloids that still appear on the FSL bench. It then drills into the confirmatory chromatographic and spectroscopic methods that close every drug identification: TLC with iodoplatinate spray for opium alkaloids, GC-FID for purity quantitation under NDPS-relevant calibration, GC-MS for identification (heroin M+ 369, cocaine M+ 303, Δ9-THC M+ 314, ketamine's chlorine isotope at M+ 237/239), LC-MS-MS for thermally labile and non-volatile analytes (synthetic cannabinoids of the JWH/AB-FUBINACA series, fentanyl analogues, benzimidazole opioids, the wider novel-psychoactive-substance landscape), and FTIR / ATR-FTIR for non-destructive bulk identification under the SWGDRUG Category A framework. The mock also covers the drug-class chemistry that explains why each test works — opiate alkaloid relationships (codeine = 3-methyl morphine; heroin = 3,6-diacetyl morphine; the unique 6-MAM heroin biomarker), cocaine chemistry and the freebase-vs-salt distinction (crack), amphetamine-type stimulants and the methylenedioxy ring substitution that gives MDMA its distinctive Marquis colour, cannabinoids (Δ9-THC, CBN, CBD), LSD analytics (Ehrlich's reagent + HPLC-fluorescence), ketamine, and the urinary metabolite work that converts cocaine into benzoylecgonine. It is pitched at first- and second-year MSc Forensic Science students at NFSU, LNJN-NICFS and other Indian universities, FACT and FACT Plus aspirants, and UGC-NET candidates. Themes covered: - Marquis, Mecke, Mandelin, Simon's, Dille-Koppanyi, Duquenois-Levine, cobalt-thiocyanate / Scott's - Microcrystalline tests for cocaine and opium alkaloids; SWGDRUG Category A/B/C - TLC + iodoplatinate, GC-FID quantitation, GC-MS identification - LC-MS-MS for synthetic cannabinoids, NPS, fentanyl analogues - FTIR / ATR-FTIR for bulk identification - Opiate, cocaine, ATS, cannabis, LSD, MDMA, ketamine chemistry - 6-MAM as the diagnostic heroin biomarker; cocaethylene; benzoylecgonine - NDPS Act 1985 — Sections 8, 21, 22, 27A, 37, 50; small/intermediate/commercial quantity scheme via S.O. 1055(E) of 2001 - *State of Punjab v. Baldev Singh* (AIR 1999 SC 2378) on Section 50 personal-search safeguard - Charas / ganja / bhang under Section 2(iii) NDPS Each question carries a detailed 220+ word explanation citing standard references — Saferstein's Criminalistics (12th edition), Moffat, Osselton and Widdop's *Clarke's Analysis of Drugs and Poisons* (4th edition, Pharmaceutical Press, 2011), the UNODC Recommended Methods for Heroin / Cocaine / Cannabis / ATS / Synthetic Cannabinoids, the SWGDRUG Recommendations, and the NDPS Act 1985 with its 2001 quantity-notification — and is mapped to specific NDPS sections and case law where relevant. Allow 15 minutes; the explanations are long enough to use as study notes by themselves. If you can pass this mock comfortably, you have the FACT Forensic Chemistry II drugs-of-abuse layer that the toxicology and case-law papers build on.