Forensic Chemistry

Forensic Chemistry is the application of Chemistry or chemical science which deals with the chemical evidence found from the crime scene. It is a very specialized type of branch which helps to find the suspect or the chemicals by which death arose or the array of chemical in the body after death or before this all are evaluated in the post-mortem. Some chemical substances or tablets are used to remedy but the overdose and habit may relate to suspected death. Arsenic was the first poison for which the analytical test called Marsh the test was formulated by British chemist James Marsh (1752). Forensic Chemist also identification of drug analysis, how much amount of drug, types of drugs, time to take the drug, etc. this type of information is earned by the investigator by putting up with statements of suspect or victim and victim’s body. The cases in which chemical evidence is found are homicides, sexual assaults, suicides, unexpected poisoning, temperament, and occupational dangers correlated with metallic toxins, pesticides, insecticides, and others. Examples of some pieces of evidence like identification of Alcohol, narcotics, petroleum products, ink, paint, dyes, firearm explosives, etc.

These are the detection method of trap cases. When someone wants illegal ransom money, then we use phenolphthalein powder which is white in colour in those bundles of note and offer them the trap notes. Whenever they will touch them the phenolphthalein will be transferred to their hands, pockets and during raid, when we wash heir hands with alkali solution, the appearance of pink colour indicates the presence of phenolphthalein and they are now trapped for doing crime.

This is the bottle of liquor found in a crime scene. The sample inside the bottle will be checked and also the bottle will be checked if any fingerprints are present or not. Checking of liquors is very important because illicit liquors can be fatal and the presence of any poison will indicate the sign of homicide.

Many a times drugs can be present on fingerprints present on any table tops. While collecting these fingerprints, also the powder present is collected separately and is tested for the presence of any drugs.

Soil samples can also contain deadly pesticides, insecticides, poisons, biological fluids like urine, blood, stool samples, etc. Also, presence of different soil samples can indicate that more than one crime scene can be present. So proper analysis of soil sample is very important.