CHM217H1 Lecture Notes - Photon, Analyte
Document Summary
Atomic spectra: sample is vaporized and decomposed into atoms composition of the atoms in the vapour are then measured by emission or absorption of characteristic"s of radiation. In a solution atomic spectroscopy can be used to distinguish one element from another. Ar ions causing excitation of fe atoms that vaporize and emit light with the same frequency as absorbed by the analyte fe in the flame: detector will measure the amount of light that passes through the flame. Difference between atomic and molecular spectroscopy is the width of absorption and emission bands . atomic spectroscopy bands are more sharper and precise. Atomic fluorescence: atoms in flame are irradiated by laser to promote them to an excited electronic state they emit fluorescence upon returning to ground state.
