Forensic Chemistry Homework Help

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What is Forensic Chemistry

Forensic chemistry is an essential branch of forensic science that includes the mechanism of arson investigation, and organic and inorganic analysis using different techniques. It employs chemistry principles for examining the physical and chemical properties of a material and its physical and chemical changes.

Forensic chemistry is dedicated to the investigation of different drugs associated with criminal activities. It investigates non-biological trace proof for identifying mysterious products discovered at the crime scene. They also examine the drugs found at the same place to recognize the products. forensic science is all about a lab setting where the professionals frequently work for an extended period and continue their investigation and research using various technical equipment.

History of Forensic Science

The history of forensic science discloses that the scientist first uses it to identify and analyze specific poisons used for the murders, and the Egyptians, Greeks and the Romans were the first to use forensic chemistry.

British chemist James Marsh was the first person to identify the first poison using a forensic chemistry test known as Marsh Test in 1752. It was Jean Stas who took the initiation of Marsh to a new level. He developed Stas's Protocol in 1850 for identifying vegetable alkaloids in human tissues. However, the invention of the spectroscope by Joseph Fraunhofer in 1859 offered the wings to scientists to analyze the trace of chemicals with ease.

Forensic chemistry mainly deals with the detection and analysis of chemicals discovered at crime scenes. The evidence helps in proving the crimes like sexual assaults, homicide, suicide, or even accidental poisoning.

Methods used in Forensic Chemistry

Spectroscopy

It is a non-destructive method that is used for analyzing various bodily fluids or drugs. The method allows the evidence to be analyzed and employs different instruments for effective testing at the crime location without hampering the evidence at the site. A spectrometer is used in this method, and for identifying the samples, the instrument analyzes the samples to available data within a spectral library.

In this method, the electromagnetic radiation gets imparted to a body, and it records the reactions. Spectroscopy is used to determine samples by absorption spectroscopy.

Chromatography

In forensic chemistry, chromatography is a laboratory technique for breaking different compounds within a mixture. Different chromatography techniques are used in forensic chemistry, such as thin-layer chromatography, paper chromatography, gas chromatography, and high-performance liquid chromatography.

Analytical Techniques Used for Special Cases in Forensic Chemistry

Identification of Drugs and Poisons

Techniques like gas chromatography or liquid chromatography are used for identifying the poisons and drugs received by others.

Drunk and Drive Cases

To determine the quantity of alcohol in the blood, gas chromatography is an ideal medium. It examines the blood alcohol concentration and proves whether the person involved in the crime was under alcoholic condition or not.

Investigation of Arson Cases

In such cases, the professionals collect the fire residues in an air-tight container and examine the type of fuel and accelerant used by the criminals. In such investigations, they use gas-liquid chromatography and mass spectrometry.

FAQs on Forensic Chemistry

What are the key responsibilities of forensic chemists?

The responsibilities of forensic chemists include analysis of non-biological trace evidence received at the crime scenes for identifying suspicious materials and also matching the same to known samples. They play a key role in proving the points of criminality based on the evidence and help the courts make the final decision.

What are the major topics included in forensic chemistry?

The students in forensic chemistry go through key topics like forensic toxicology, biological evidence, forensic analysis of DNA, Human osteology, toxic substances etc.

Forensic Chemistry Samples Included by Our Professionals

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