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Chromatography is an analytical method to separate a mixture into different components based on their chemical properties. In one form of chromatography, a liquid or gaseous mixture is passed through a tube containing a "stationary phase" (column chromatography). For gasses, this usually means coating the walls of a thin tube with the stationary phase. For liquids, it usually involves something that looks more like sand or powder. If the composition of the stationary phase is chosen correctly, the different components in the mixture will absorb and desorb from the stationary phase at different rates. Some will pass through quickly because they don't absorb very well into the stationary phase and desorb quickly while others pass through slowly as they get absorbed easily and desorb slowly. As a consequence, the different components come out the other end at different times. The amount of each is determined by some kind of detector.

A second kind of chromatography is a bit like the liquid chromatography described above, except drops of the mixture are placed at one end of a sheet of paper or a sheet of glass coated with a stationary phase. A solvent is then applied to one end of the sheet and slowly carries the mixture with it to the other end of the sheet. the mixture gets separated into its different components with some moving only a short distance from the beginning end and others moving further along the sheet. At the end, the sheet winds up with stripes of the different components at different locations.

In forensics, chromatography can be used to determine what is in a mixture. When people go in for drug tests, their urine may be analyzed using chromatography to determine if they have drugs or drug byproducts in their urine. In forensic pathology, a sample may be analyzed to determine what chemicals are present in the dead body and possibly indicate if there is a poisonous substance present that may have killed them, or whether they were on drugs or drunk at the time of their death. It may also be used to analyze samples taken from crime scenes to find out if any unusual substances are present that might indicate where something came from or where someone may have been prior to entering the crime scene. At airports it can be used to detect minute traces of explosives.

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โˆ™ 2010-04-26 13:32:42
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Q: How is chromatography used in forensic science?
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Related questions

How is chromatography used?

Chromatography is used in forensic science. It seperates ink and can remeble links with criminals helping to solve cases. Answer: Chromatography is used in pharmaceutical industries for the synthesis of various drugs to check whether the product is synthesized from the reactants or not. It is used in petrochemical industries to check the purity of the fuel and its additive. It is also used by forensic scientists & helps them in solving different cases.


What is chromatography used in science?

chromatography seperates substances from an object


How is science used in forensics?

Forensic Science.


What type of mathematics are used for forensic science?

are there any answer that math is related to forensic science


What's the difference between a forensic scientist and a forensic science technician?

Forensic science is used to describe all categories of science in the legal system. forensic technicians are in a certain category within forensic science.


Why is chromatography useful to a forensic expert?

Chromatography is the study of the chemical composition of fibers. It is useful to a forensic expert for classifying human hair.


How do you use chromatography in everyday life eg forensic science and Csi crime scene Inveatigation?

yes by using csi to help you


Where is Forensic Science used in everyday life?

Solving crimes and performing autopsies are 2 such uses of forensic science.


How is science used in DNA chromatography?

don't know either


What is the difference between science and forensic science?

Forensic Science is the application of the methods and techniques of science to legal problems. So any scientific methods from any of the sciences used can be 'forensic' if they are being used to solve problems of a legal nature.


Where do people use paper chromatography?

In forensic chemistry!


Why do forensic scientists use chromatography?

to solve crimes

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