Temporal Variation in Gas Temperature at the Atomization Stage in Several Types of Graphite Furnaces for Atomic Absorption Spectrometry

Abstract

In order to compare and evaluate the atomization process occurring in several types of graphite furnaces for atomic absorption spectrometry, the authors estimated temporal variations in the gas temperature by using a two-line method under the assumption of a Bolzmann distribution. The atomization furnaces employed were a graphite tube, a graphite tube coated with pyrolitic carbon, a graphite tube with a platform and a graphite cup. Differences in the temporal variation in the gas temperature among these graphite furnaces were observed.

Degradation Process of Graphite Furnace Estimated from the Atomic Gas Temperature of Iron in Graphite Furnace Atomic Absorption Spectrometry

“…The concentration of the sample solution in the present work was determined to be the highest in this range. 18,19) Working solutions were each prepared by diluting from the stock solution before use. The nitric acid and the sulfuric acid employed were an electronics industry grade (Wako Pure Chemical Industries Ltd., Japan), and deionized water (Yamato Scientific Co. Ltd., Japan) was used for all preparations of the sample solutions.…”

“…[18][19][20] In the developed method, iron is selected as a probe element. The atomic gas temperature of iron is observed by using two iron atomic lines assigned to the 3d 6 4s-3d 5 4s4p transition.…”