PHYSICS 102 Lecture Notes - Lecture 4: Gunshot Residue, Atomic Absorption Spectroscopy, Inductively Coupled Plasma
Document Summary
Infrared spectroscopy organic analysis: heavy metals elemental analysis, highly sensitive, analysis can be by, absorption, emission, fluorescence, various detectors can be used. Can be used in the analysis of gunshot residue lead is now being removed because it is poisonous and being replaced by titanium and zinc (this now gives an estimate of the age of the gun). Can also be used in the analysis of fibres and hairs looking for metals and non-metals. Substances like arsenic can be seen, if they have been poisoned slowly overtime (the dates of the poisoning can be calculated if the concentration of arsenic is known and the hair growth speed 0. 14mm a day). Can be used in the analysis of paints: lead, chromium, zinc, titanium, barium, iron etc colour compounds are used to add colour. Finally, used in the analysis of water and soil environmental, scene of crime, toxicology (poisoning through water) and explosive residues (in bombings).
