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

Determine the order of increasing energy, The atomic orbitals are progressi...

The atomic orbitals are progressively filled in order of increasing energy. This principle is called as: (1) Hund's rule (2)Aufbau principle (3) Exclusion principle (4

Water Treatment Process, I have to write about the water treatment and the ...

I have to write about the water treatment and the fda and epa and compare and contrast the rules and regulations for tap and bottled water and stuff. Can you help?

Cycloalkanes., Explain ten methods of preparation of cycloalkanes from stra...

Explain ten methods of preparation of cycloalkanes from straight and branched alkanes

Iodororm test, how to make project on iodoform?

how to make project on iodoform?

Periodic table, Explain variations of electronegativity in group & period

Explain variations of electronegativity in group & period

Ethyl group in the most stable or not, The propyl group on carbon-4 has to ...

The propyl group on carbon-4 has to be gauche to either the ethyl group or the isopropyl group. Due to the isopropyl group is larger, the propyl group is gauche to the ethyl group

Define statement when electron is not equally determined, The position and ...

The position and velocity of a small particle like electron cannot be simultaneously determined." This statement is: (1)  Heisenberg uncertainty principle (2)  Principle of

Atoms, What would be the benefit of knowing where the electrons are at any ...

What would be the benefit of knowing where the electrons are at any time?

Explain product optimization, Product Optimization Sensory analysis du...

Product Optimization Sensory analysis during this phase of product development is critical and includes extensive evaluation with many kinds of tests, each playing a specific

The radius of first bohr''s orbit for hydrogen, The radius of first Bohr's ...

The radius of first Bohr's orbit for hydrogen is 0.53 Å. The radius of third Bohr's orbit would be: (1) 0.79 Å              (2) 1.59 Å      (3) 3.18 Å      (4)4.77 Å

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