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ATOMIC ABSORPTION SPECTROSCOPY

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on 1 January 2017

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Transcript of ATOMIC ABSORPTION SPECTROSCOPY

Atomic Emission Spectroscopy (AES)
EMISSION SOURCES:

Flames

Arcs / Sparks

Direct Current Plasmas (DCP)

Inductively Coupled Plasmas (ICP)

Microwave induced Plasmas(MIP)
Schematics
Atomic absorption
Atomic absorption spectroscopy
ATOMIC ABSORPTION SPECTROSCOPY
And
ATOMIC EMISSION SPECTROSCOPY

Flame Emission and Atomic Absorption Spectroscopy
Atomic Emission (with thermal excitation), AES

Atomic Absorption, (with optical photon unit) AAS

Atomic Florescence, AFS
Atomic Emission Spectroscopy (AES)
By exposing these atoms to such temperatures they are able to “jump” to high energy levels and in return, emit light. The versatility of atomic absorption an analytical technique (Instrumental technique) has led to the development of commercial instruments. In all, a total of
68
metals can be analyzed.

Atomic Absorption Spectroscopy (AAS) is a very common technique for detecting metals and metalloids in samples.

It is very reliable and simple to use.

It can analyze over 62 elements.

It also measures the concentration of metals in the sample.

Hollow Cathode Lamp
Advantages of AAS
Determination of
68
metals
Ability to make
ppb
determinations on major components of a sample
Precision of measurements by flame are better than
1% rsd
. There are few other instrumental methods that offer this precision so easily.


AAS analysis is subject to little interference.
Sample preparation is simple (often involving only dissolution in an acid)
Instrument easy to use and operate

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