GFA Graphite Tubes

In graphite furnace technology, it is important to select the graphite tube according to the target element and sample composition. Actually there is a wide variety of different graphite tubes used in electrothermal atomization. Shimadzu´s atomic absorption spectrometers can be operated with different tube types: high density graphite tube, pyrolytic coating graphite tube, a “fork”- platform graphite tube and last not least the omega platform tube.

Benefits of platform tubes

Using platform tubes increases sensitivity

AAS Tubes

As less contact area between tube and platform, as higher is the time delayed heating and as higher is the sensitivity enhancement

The outer tube is heated directly by high current (black).

Subsequently, the inner atmosphere is heated by radiation (blue).

Sample/atoms start to evaporate but can condensate because atmosphere temperature is too low, which means a loss of sensitivity.

The platform (orange/green) is heated less fast than the outer tube (black). As less contact area between tube and platform, as higher is the time delay. This enhances sensitivity.

Tubes Ordering Information

Ref.   Description Content P/N
High-density graphite tube 1 pc. 206-50587-12
10 pcs. 206-50587-85
Pyro-coated graphite tube 1 pc. 206-50588-11
10 pcs. 206-50588-84
Platform tube 1 pc. 206-50887-02
Omega-platform tube 1 pc. 980-05340

Starter Kit:

Graphite cap, Graphite holder,

4 tubes (Pyro-coated, High-density, Platform, Omega-platform)

6 pcs. 980-08855

Tube Holder / Cap Ordering Information

  Description Content P/N
Graphite Cap 1 pc. 206-50602RI
Graphite Holder 1 pc. 206-50603RI
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