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
benzoic acid from benzene.i can''t see it clearly

complete detailed information

Types of interferences: The various kinds of interferences encountered in analysis through flame photometry are: Spectral interferences Ionisation interferences

What are hormones? State the function of the following hormones: (a) Testosterone (b) Oxytocin

during the process of extraction of pure copper from copper pyrite,SiO2 acts as acidic flux which combines with iron oxide(FeO) to form iron silicate(FeSiO3). CuFeS2 + heat ---> Cu

Selecting and Numbering the principal chain Selecting the principal chain : choose the longest continuous chain of carbon atoms consisting of the principal functional

how we determine the compound is ir active or not . and how we determine the polarity of a compound?

a bacterial culture isolsted from sewaga produces36.4cm of methane gas at 27C and 760mmHg this gas occupies 33124cm at 0c and same pressure explainvolume temperature relation ship