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Analysis Service

Forensic Chemistry Division provides scientific support to law enforcement with the state-of-the-art analytical techniques. The goal is to contribute the identification of chemical substances and the reconstruction of crime scene in various cases, such as murders, assaults, suicides, arson, explosion, chemical leaking, terror, addiction, etc. The division also conduct the analysis of biological evidences in the case of driving under the influence of alcohol(DUIA), sexual assault cases, and alcohol/disease related death cases.

  • Trace Evidence Analysis

    Analysis of various trace evidence (fibers, paints, glass, soils, etc.) found at crime scenes

  • Chemical Fingerprinting Analysis

    Determination of a source of origin and comparison of questioned materials to known materials based on stable isotope ratio and multi-elemental analyses

  • DUIA/Biomarkers for Alcohol Consumption and Diseases

    Analysis of blood alcohol concentration(BAC) and biomarkers for death related diseases in cases of driving under the influence of alcohol(DUIA), sexual assault cases, and postmortem cases.

  • Hazardous chemical analysis

    Analysis on acids, alkalis, hazardous chemicals, environmental pollutants, harmful gases

  • Fire debris and inflammable substances analysis

    Flammable liquids, organic solvents, ketone bodies, illicit oils

Introduction of Laboratory

The Forensic Chemistry Division consists of five sections including Trace Evidence Analysis Lab., Chemical Fingerprint Analysis Lab., Hazardous Chemical Analysis Lab., Volatile Substance Analysis Lab., and Blood Alcohol Content Analysis Lab.

 
01 Trace Evidence Analysis Lab

Performs analysis on trace evidence includes fibers, resins, paints, and different types of foreign materials related to various cases such as murder, robbery, theft, crash, etc.. Analysis of trace evidence is performed by infrared spectroscopy (FT-IR), microspectrophotometry(MSP), Raman spectroscopy, and X-ray fluorescence spectroscopy (XRF), X-ray diffractometer (XRD) with various microscopes (stereoscopic microscope, high magnification microscope, polarizing light microscope, etc.).

02 Chemical Fingerprint Analysis Lab.

Determines a source of origin and performs comparison of questioned materials to known materials based on chemical fingerprints of substances by the stable isotope ratio and multi-elemental analyses. Trace elements and isotope composition of materials vary depending on a source of origin and raw materials used for manufacturing products. Chemical fingerprint analysis is performed using the-state-of-the-art instrument (LA-ICP-MS, IRMS, XRF, XRD, etc.) to determine a source of origin and to perform comparison of questioned materials to known materials such as paint chips, tape, glass fragments, and so on. The laboratory has established a database of glass, soil, tape, etc. to achieve goals by the stable isotopes and multi-elemental analyses.

03 Hazardous Chemical Analysis Lab.

Determines the presence and concentration of various hazardous chemical substances, including heavy metals and acids in water, soil and waste in different forensic environmental cases. In addition, the lab performs the analysis of chemical agent components from biological samples, related to leak, spraying, suicide, homicide, and poisoning cases including misuse and abuse, etc..

Alcohol concentration measurement and ketone analysis for dead bodies

  • The laboratory confirms the alcohol concentration and measures the content related to decomposition index substances and drinking in blood and other tissues of a dead body. It performs ketone analysis, which is an index substance for chronic alcoholism, diabetes, etc., and contributes to solving the cause of death.
  • Blood Sampling Kit for Control
  • Standard Substances for Analysis on Blood Alcohol
04 Volatile Substance Analysis Lab.

Analyzes ignitable liquids from fire residues collected from fire scenes to determine whether ignitable liquids are related to the case. Also, the lab analyzes and evaluates the authenticity of oil in fraud oil cases, the causative material of an accident in explosion or fire cases, and hazardous gases in accidental poisoning and suicide cases.

Tasks on Environmental Hazardous Substances

  • The laboratory traces the source of discharge and determines contamination to identify the cause of occurrence by analyzing environmental samples in the case of environmental accidents such as unauthorized discharge of wastewater, illegal dumping of waste, damage to crops, and abandonment of aquatic products.

Tasks on Dead Bodies

  • The laboratory estimates the cause of death by measuring the electrolyte concentration in the blood, etc.
  • Carbon monoxide in the blood of a deceased associated with a fire or suicide
  • It measures hemoglobin and determines the cause of the accident such as suicide or homicide, etc.
05 Blood Alcohol Concentration Analysis Lab.

Conducts the analysis of biological evidences in the case of driving under the influence of alcohol(DUIA), sexual assault cases, and alcohol/disease related death cases. The lab confirms the alcohol concentration and measures the content related to decomposition index substances and drinking in blood and other tissues of postmortem specimens performing ketone analysis, which is an index substance for chronic alcoholism and diabetes. Recently, the lab has developed a new method to determine the consumption of alcohol analyzing the ethanol metabolites(EtG and EtS) from blood and urine samples.

Analysis and evaluation of illicit oil related to petroleum products

  • The Volatile Substance Research Lab analyzes and evaluates the authenticity of oil manufactured by mixing another petroleum product or petrochemical product to a certain petroleum product as well as alternative fuels.

Analysis and evaluation of chemical agents for chemical accidents

  • The laboratory analyzes and evaluates the causative material of an accident when an explosion or a fire occurs during the chemical process, and promptly implements an on-site assessment in the event of a chemical leak accident.

Analysis and evaluation on harmful gases for harmful gas poisoning accidents

  • The laboratory identifies the cause of various safety accidents by harmful gases and analyzes and evaluates the gas that caused a poisoning accident or gas suicide.
 

Lab Photo

Laboratory Equipment

Laboratory Equipment

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XRD

 

  • Analysis of information about the atomic and molecular structures of crystals using the diffraction of X-rays incident into the crystals
  • High-performance, non-destructive analysis for the analysis of material structure such as cement, rocks, metals, inorganic matters, and polymers

 

Laboratory Equipment

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IR/MS

 

  • Analysis of hydrogen, oxygen, nitrogen, carbon and sulfur isotope ratio
  • Analysis of coidentity of industrial products
  • Tracking the origin and environmental pollutant source

 

Laboratory Equipment

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Raman

 

  • Analysis of non-destructive components of organic, inorganic and polymeric materials such as fibers, dyes, pigments, soil, paint, resins, plastics, and tapes
  • Analysis of constituents of water-soluble matters to be analyzed

 

Laboratory Equipment

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IC-MS/MS

 

  • Identification of acid/alkali components and determination of the content
  • Identification of sulfide ion and its concentration in human derivatives of death from asphyxiation by hydrogen sulfide
  • Confirmation of electrolyte concentration in blood
  • Identification of organic acids and sugars and their contents

 

Laboratory Equipment

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LA-ICP-MS

 

  • Measurement of concentrations of main elements and trace elements
  • Measurement of concentrations of ink, hair, glass, metal, etc.
  • Standard contents of harmful heavy metals

 

Major Analysis Cases

Major Analysis Cases

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2004.03
불임치료목적으로 복용한 반묘(cantharides)에
의한 사망사건

강원도 원주시 한의원에서 불임치료목적으로 지은 한약, 한약가루약(일명 반묘가루) 및 한약추출액을 혼합하여 마신 직후 환자가 사망하였으며, 감정결과 위 내용물 및 혈액에서 칸타리 딘(cantharidin)이 검출됨. 칸타리딘은 반묘의 주성분으로 치사량이 10mg이고 과량복용시 복통, 이질, 토혈, 혈뇨, 혈압 저하 등에 이어 사망한다고 알려져 있음