What is spectroscopy used for in forensics?
Spectroscopy has proven to be a non-destructive method for successfully analyzing different bodily fluids as well as other types of forensic materials such as drugs or fingerprints. This allows the evidence to be tested while still preserving it.
What information can be obtained from UV spectroscopy?
UV-vis spectroscopic data can give qualitative and quantitative information of a given compound or molecule. Irrespective of whether quantitative or qualitative information is required it is important to use a reference cell to zero the instrument for the solvent the compound is in.
What is UV-VIS spectroscopy and how does it work?
A UV-Vis spectrophotometer measures the intensity of light transmitted through a sample compared to a reference measurement of the incident light source. … The transmitted light is acquired by a CCD optical detector with a wavelength accuracy of within 0.5nm.
How does UV spectroscopy work?
UV spectroscopy obeys the Beer-Lambert law, which states that: when a beam of monochromatic light is passed through a solution of an absorbing substance, the rate of decrease of intensity of radiation with thickness of the absorbing solution is proportional to the incident radiation as well as the concentration of the …
What spectroscopy methods do forensic scientists use?
Analytical techniques such as SEM-EDX, FTIR, XRF, and ICP-OES and ICP-MS are utilized in forensic laboratories to obtain information on the elements involved within these glass materials. Fluorescence spectroscopy may also be used for visual comparisons as most glass pieces fluoresce.
How is chromatography used in forensics?
Background: Chromatography is a method for analyzing mixtures by separating them into the chemicals from which they are made. … Forensic scientists are able to use ink chromatography to solve crimes by matching documents or stains found at a crime scene to the marker or pen that belongs to a suspect.