Abstract

Pulse introduction of a sample into a graphite furnace requires that the sample be heated rapidly enough that the evaporation time is much shorter than the retention time. To achieve that condition, in the graphite cuvette L'vov used an additional power source. In a Mass-mann-type furnace the graphite tube containing the dried sample is heated quickly by a powerful ac current to obtain the desired short evaporation time. The simplest way of sample heating is in a Woodriff constant-temperature furnace. The furnace is kept continuously at high temperature and a graphite crucible containing the dried sample is introduced into the furnace. The crucible is heated by conduction and radiation fast enough that the evaporation time is short compared to the residence time. This technique has been applied to a number of problems.

A Modified King Furnace for Absorption Spectroscopy of Small Samples

F. S. Tomkins and B. Ercoli
Appl. Opt. 6(8) 1299-1303 (1967)

Hot Tube Atomic Absorption Spectrochemistry

Ray Woodriff and Ronald W. Stone
Appl. Opt. 7(7) 1337-1339 (1968)

Method of Measuring Target Temperature in a Solar Furnace

Osamu Kamada
Appl. Opt. 3(12) 1397-1400 (1964)

Atomic Absorption Spectroscopy with High Temperature Flames

J. B. Willis
Appl. Opt. 7(7) 1295-1304 (1968)

Laser-induced breakdown spectroscopy at high temperatures in industrial boilers and furnaces

Linda G. Blevins, Christopher R. Shaddix, Shane M. Sickafoose, and Peter M. Walsh
Appl. Opt. 42(30) 6107-6118 (2003)