Atomic emission spectrometry, Chemistry

Atomic emission spectrometry:

In atomic emission spectrometry (AES), a reproducible and representative amount of the sample is introduced into an atomization-excitation source where it is converted into atomic vapours of the analyte in excited state. In the atomisation-excitation source the analyte undergoes a number of processes to be atomised and then get excited. As the excited state is short lived, an excited atoms return back to the ground state accompanied through the emission of electromagnetic radiation which is characteristic of the constituents of the sample. An AES is a versatile technique because of the availability of a huge range of atomisation-excitation sources.

Plasma is a high energy source which is an electrically neutral conducting gaseous mixture having a significant concentration of cations and electrons. As an electrical conductor it can be heated inductively by coupling with an oscillating magnetic field. The temperature of the plasma may be of the sequence of 5,000 to 8,000 K.

In the ICP-AES the analyte sample is introduced into the centre of the plasma as an aerosol with the help of a nebuliser using argon flow. As the energy of the plasma source is quite high it ensures the excitation of the atoms of all the elements present in the sample which then relax by emitting EM radiation of characteristic wavelengths of different elements. Thus, it is a multi element technique.

Posted Date: 1/10/2013 3:06:17 AM | Location : United States







Related Discussions:- Atomic emission spectrometry, Assignment Help, Ask Question on Atomic emission spectrometry, Get Answer, Expert's Help, Atomic emission spectrometry Discussions

Write discussion on Atomic emission spectrometry
Your posts are moderated
Related Questions
What are the systems for which concept of continuum is not applicable and why?

giving correct formulas give the reactantsand products in the formation of poly2 butane

Thirty pounds of coal (analysis 80% C and 20% H ignoring the ash) are burned with 600 lbs of air (with a variable humidity), yielding a gas have an Orsat analysis in which the rati

NITROGEN Nitrogen is the great strength of the triple bond makes N2 thermodynamically and kinetically stable but moderately electronegative element. The atom can form three sing

Ingrain dyes (developed dyes) - Ingrain dyes are those that are synthesised straight on the fabric. Instances of this type of dyes are azo dyes. In this the fabric is wrapped up


Test of glucose - Biomolecules (a) While heated in a waterless test tube, it melts, turns brown and finally black, provoding a characteristic smell of burnt sugar. (b) While

Q. Show the Liquation in purification of metals? Crude tin, bismuth and lead are purified by liquation. In this process, the impure metal is placed at the top of a sloping hear


a. Calculate the global radiation density (kWh/m 2 ) received by five panels located in San Jose on July 1, 2012: Panel A: Tilt=37.3 o , Azimuth=180 o (South) Panel B: Ti