Atomic spectroscopy, Chemistry

Assignment Help:

Atomic spectroscopy:

Atomic spectroscopy is the oldest instrumental method of elemental analysis. The origin of these methods dates back to the times of Bunsen and Kirchhoff in the mid- 19th century whereas they showed in which the optical radiation emitted from flames is features of the elements present in the flame and the intensities of the emitted radiation were dependent on the amount of elemental species present.

The atomic spectroscopic techniques are based on the transitions amongst the quantised electronic energy stages caused through the absorption of radiation through the atoms within vapour phase or by the emission of radiation by the excited atoms. Since the transitions manifest in terms of absorption, emission or fluorescence emission. Therefore, we have atomic emission, absorption and fluorescence spectroscopies. The kind of atomic spectroscopic method is determined both through the method of atomisation as well as the nature of the analyte radiation interaction. In compare to the molecular spectra, the atomic spectra consist of a number of sharp absorption lines, features of the atomic species. The signals within an atomic spectrum are also characterized in terms of the position, intensity and the band width.

Flame photometry is a technique for the determination of elements that could be simply excited and is based upon the measurement of intensity of radiation emitted, within the visible region, while a metal is introduced into a flame. A wavelength of the emitted radiation, tells us what the element is or the intensity of the radiation tells us how much of the element is present. A sensitivity of the flame photometric techniques depends on the number of excited atoms that in turn depends on the flame temperature. A flame temperature is a function of the kind of fuel and oxidant used.


Related Discussions:- Atomic spectroscopy

Liquification of gases, tell me about liquification of gases in detail but ...

tell me about liquification of gases in detail but in most easy words

Tritium is the isotope of, Tritium is the isotope of: (1) Hydrogen     ...

Tritium is the isotope of: (1) Hydrogen      (2) Oxygen       (3) Carbon               (4)Sulpher Ans:  Hydrogen

Electrochemical thermodynamics, ELECTROCHEMICAL  THERMODYNAMICS Nota...

ELECTROCHEMICAL  THERMODYNAMICS Notation: To avoid repetitive drawing of complicated cells diagram, a common notation has been adopted for cells. All electrical contacts

Example on crystal field splitting in octahedral complexes, Q. Example on C...

Q. Example on Crystal field splitting in octahedral complexes? Here four ligands lie in one plane and the other two in a plane perpendicular to the first plane. Six ligands are

Find out the temperature of ellingham diagrams, Q. Find out the temperature...

Q. Find out the temperature of Ellingham diagrams? Ellingham diagrams are very useful for finding out the temperature at which appreciable reaction occurs. The lower the ΔG 0

Stereoisomers, how to draw 3D stereoisomers for a compound?

how to draw 3D stereoisomers for a compound?

Calculations, how to calculate alcoholic acidity as a H2SO4

how to calculate alcoholic acidity as a H2SO4

Matter, why the water is compound

why the water is compound

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd