Page "Atomic absorption spectroscopy" Paragraph 23

Although a wide variety of graphite tube designs have been used over the years, the dimensions nowadays are typically 20 – 25 mm in length and 5 – 6 mm inner diameter.

With this technique liquid / dissolved, solid and gaseous samples may be analyzed directly.

A measured volume ( typically 10 – 50 μL ) or a weighed mass ( typically around 1 mg ) of a solid sample are introduced into the graphite tube and subject to a temperature program.

This typically consists of stages, such as: