Abstract: Chemical analysis methods. Category: Engineering, manufacturing

Abstract: Chemical analysis methods Category: Engineering, manufacturing
Atomic absorption methods of analysis: The method is based on measuring the absorption of light of a certain wavelength unexcited atoms of the element. Special light source gives the resonant radiation, ie radiation corresponding to the transition to electronic naynizshuyu orbital with the lowest energy, with the closest to the orbital with a higher energy level. Decrease in the intensity of light as it passes through the flame due to the transfer of the electrons of the atoms of the element in the excited state is proportional to the number of excited atoms in it. Atomic absorption is used in admixture with fuels before 3100oS temperature, which increases the number of elements determined in comparison with the flame photometry.... If you get more information, visit our site: BEST ESSAY CHEAP