Chemical Analysis for Criminal & Civil Investigations

We identify, confirm, and quantify chemicals in evidential materials—ranging from petroleum products and industrial chemicals to narcotics and post‑explosion residues—using validated forensic protocols and ultra‑modern instrumentation.

Scope of Examination

Petroleum products, cement, explosives & post‑explosion residues, oils & fats, dyes, dangerous drugs (heroin, brown sugar/guard, cocaine, methaqualone, LSD), narcotics (opium, cannabis: charas, ganja, bhang), industrial chemicals, and residues in cases of murder, arson, explosion, theft, cheating, etc.

Court admissible Chain-of-custody rigor Modern instruments

Toxicological Consumption Analysis

In suspected consumption of narcotic drugs, blood and urine samples of the accused are received and subjected to screening and confirmatory tests.

Screening assays followed by confirmatory instrumental analysis Chain‑of‑custody and court‑ready documentation

Division & Subject Head :
Dr.S.O.Chetti

Designation :
Deputy Director

Email :
[email protected]

Phone :

Chromatography Suite

HPLC, GLC, GC–MS, GC‑ATD, GC‑DHA, GC‑HS, Ion‑Chromatography.

Spectroscopy & Elemental

UV/IR Spectrophotometry, Atomic Absorption Spectrophotometer, Elemental Analyzer.

Thin Layer & Advanced

High‑Performance Thin Layer Chromatography (HPTLC) Scanner and other automated equipment for petroleum product characterization (flash point, viscosity, distillation range).

Explosives & Post‑Explosion Residues

Characterization and identification of explosive compounds and combustion by‑products to support arson and blast investigations.

Trace analysis of inorganic & organic residues Comparative profiling and source inference

Narcotics & Dangerous Drugs

Heroin, brown sugar/guard, cocaine, methaqualone, LSD; opium and cannabis derivatives (charas, ganja, bhang).

Screening Confirmatory GC‑MS Quantitation Toxicology

Oils, Fats & Dyes

Composition, adulteration checks, and comparative analysis for evidential linkage.

Petroleum Products

Flash point, viscosity, and distillation range with GC‑DHA and allied methods..

Cement & Industrial Chemicals

Material identification and comparison supporting theft, cheating, and quality disputes.

Ultra‑Modern Instruments

Our laboratory deploys a comprehensive suite of analytical platforms to ensure sensitive detection, specific identification, and defensible quantitation.

High‑Performance Liquid Chromatography (HPLC) Gas‑Liquid Chromatography (GLC) UV / IR Spectrophotometers Atomic Absorption Spectrophotometer HPTLC Scanner Gas Chromatography – Mass Spectrometer (GC‑MS) Ion‑Chromatograph Gas Chromatography – Ion Scan GC – Automated Thermal Desorption (GC‑ATD) GC – Detailed Hydrocarbon Analyzer (GC‑DHA) GC – Head Space (GC‑HS) Elemental Analyzer

Typical Case Types

Murder, arson, explosion

Theft & cheating

Consumption of narcotic drugs

Reporting & Quality

Standard operating procedures and method validation

Court‑defensible results with clear interpretation

Need an expert chemical analysis?

Submit case exhibits with proper sealing, labeling, and requisition details. Our team will guide sampling and preservation to maintain evidential integrity.

FAQ's

Which types of cases received in General Analytical and Instrument Division?

In General, Analytical and Instrument Division Receives cases related to Narcotic drugs and psychotropic substances, Fire/Arson, Explosive/ Explosive residues, Petroleum Hydrocarbon oils (Adulteration), organic solvents, Petroleum products, Cement, Chilli powder examination, Vegetable oils, Acid and Alkali Attacks and Trap cases.

What are different types of Narcotic drugs and psychotropic substances?

Narcotic drugs and psychotropic substances are of Natural, semi synthetic and synthetic in nature e.g., Natural -Ganja, Charas, semi synthetic -Heroin, Cocaine ;synthetic-Ketamine , Methamphetamine

What are Common offences under NDPS Act 1985?

Possession, sale, purchase, Manufacturing, Transport, Import, export and financing such activity are strictly prohibits and amends strict punishment. consumption of such substances or intoxication is also liable to prosecution.

Who can send sample for examination?

State Police, Anti Narcotic Cell, Anti-corruption Bureau, CID, State Excise Department, Railway police (State), Medical officers and Court if directs to examine the sample

What kind of samples are being examined?

In this Division Different kind of exhibits are received for examination. In case of Fire/ arson unburnt/ partly burnt / burnt clothes, burnt Debris, Petroleum hydrocarbon oils. In case of explosion cases articles seized from crime scene are submitted, it also includes exploded detonator and parts of IED. Cement, Concrete, Mortar for examination of cement. so, the samples vary from case to case.

Which precaution should take while sending petroleum hydrocarbons, solvents and acid/ alkali for examination?

Petroleum hydrocarbons like Disel, Petrol are preferably sent in aluminum container, different type of organic solvents and acid /alkali should send in glass bottles if seized from crime scene.

What kind of samples are being examined in trap cases?

It includes clothes articles, paper, Bags, Currency Notes for detection of Anthracene

What kind of samples are examined for Narcotic Drugs?

Different types of seized samples in natural, semi synthetic and synthetic form (Solid, Liquid, semi solid) precursors, solvents, chemicals used for synthesis of such substances are examined. Also, Blood and Urine samples being examined in case of consumption.

What is explosive?

Explosive are chemical compound or mixtures which will on application of an external stimuli’s such as shock, friction or ignition undergo a rapid chemical decomposition as results produce large amount of energy due to liberation of gas and heat.

What are types of explosives?

Low explosive and High Explosive

What is IED?

These are improvised explosive devices and not have fixed standards of their composition.

What are samples received in Forensic Laboratories in related to explosive?

After explosion, the remanent is collected and sent for forensic analysis to find out which explosive substances were being used, it includes parts of exploded detonator. The unexploded detonator is being exploded by Bomb diffusion Squad and then its sample is forwarded to Forensic Analysis. In case of illegal manufactures, illegal sale of Cracker, Explosive material its preparation such sample also received by Forensic science laboratories.

Which Instrument are being used in General Analytical and Instrument Division for examination of samples?

High sophisticated instruments are used in General Analytical and Instrument Division, it includes HPLC, Gas Chromatograph, GC-MS, FTIR Spectrophotometer, Raman Spectrometer UV Spectrophotometer, Auto Distillation, Flash Point Apparatus, Viscometer…etc.