Atomic absorption spectrophotometry, Chemistry

Assignment Help:

Atomic absorption spectrophotometry:

Atomic absorption spectrophotometry (AAS) concerns the absorption of radiation by the atomised analyte element in the ground state. The atomisation is achieved through the thermal energy of the flame or electrothermally within an electrical furnace. The wavelength(s) of the radiation absorbed and the extent of the absorption form the basis of the qualitative and quantitative determinations respectively. As atomic absorption spectrophotometry is not an absolute method of analysis, the routine analytical methodology for quantitative determinations using AAS is based on calibration method. Besides that the internal standard method and standard addition methods are also employed.

A typical atomic absorption spectrophotometer consists of a source delivering the characteristic resonant radiation of the analyte, an atom reservoir into which the analyte is introduced and atomised, a monochromator, a detector and a readout device. In a typical flame atomic absorption spectrophotometric determination, the radiation from a hollow cathode lamp (or electrodeless discharge lamp) is made to fall on the sample of the analyte aspirated within the flame (or in the cuvette of an L'vov graphite furnace), while a part of it is absorbed. A transmitted radiation is then dispersed through a monochromator and sent to the detector. The detector output is suitably processed and is displayed by appropriate readout device. Like, UV-VIS spectrophotometers the atomic absorption spectrophotometers are also of two types' viz., single beam atomic absorption spectrophotometers and double beam atomic absorption spectrophotometers.


Related Discussions:- Atomic absorption spectrophotometry

Matter, name any 10 chemical compound used at homewith their molecular form...

name any 10 chemical compound used at homewith their molecular formula

Heterolysis bond fission or heterolytic, Heterolysis bond fission or Hetero...

Heterolysis bond fission or Heterolytic (i) In heterolysis bond, the covalent bond is broken in such a way that one species (that is., less electronegative) is deprived of its

General principles for naming organic compounds, General principles for nam...

General principles for naming organic compounds In the general system, all the isomeric alkanes (having similar molecular formula) have the the same parent name. The names of

Synthesis of freon and freon synthesis, explain the synthesis of freon and ...

explain the synthesis of freon and westron i need only the synthesis of those coompound

Explain collodion, How are the following sole produced (a) Sulphur sol ...

How are the following sole produced (a) Sulphur sol (b) Collodion

S block, what is the first maximum innaisation energy metal in s block

what is the first maximum innaisation energy metal in s block

Stochiometry, a sample of CaCo3 and MgCo3 weighing 192g is ignited to const...

a sample of CaCo3 and MgCo3 weighing 192g is ignited to constanr weight of 104 gm . what is the composition of mixture ?

Chemistry, 3 kinds of isomerism indienes alkynes

3 kinds of isomerism indienes alkynes

Protein determination, Protein determination In experimental chemistry,...

Protein determination In experimental chemistry, biochemistry, biology and biotechnology, it is often vital to know the amount of protein present in a solution. For instance yo

Polyglycolic acid or pga - polymers, Polyglycolic acid (PGA) : It is acq...

Polyglycolic acid (PGA) : It is acquired by the chain polymerisation of cyclic dimer of glycolic acid, OH-CH2-COOH.

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