Construction and Evaluation of a Versatile Graphite Filament Atomizer for Atomic Absorption Spectrometry

Abstract

A simple, versatile atomizer of the electrically heated graphite rod type is described and used for atomic absorption studies. The atomizer utilizes a burner head (directly under the rod) to produce a H2-Ar-entrained air flame; the flame is primarily useful in minimizing ambient air entrainment in order to maintain a highly reducing environment directly above the rod where atomic absorption measurements are generally taken. Temperature profiles of the H2-Ar-entrained air flames and also the temperatures of the graphite rod at various currents were measured, and appropriate plots are given. Several types of graphite and several different ways of holding liquid samples on the atomizer were also compared. Detection limits and analytical curves of aqueous solutions of Ag, As, Au, Cr, Cu, Fe, Mg, Ni, and Pb and oil-based solutions of Ag, Cu, and Fe are given. This atomizer should be of even greater use for atomic fluorescence studies.

Fundamental aspects of flameless atomic absorption using the mini-Massmann carbon rod atomizer

“…Figure7. Influence of heating rate on both peak height and peak separation for cobalt in blood plasma using the step mode heating procedure…”

Analysis of petroleum for trace metals. Determination of trace quantities of beryllium in petroleum and petroleum products by heated vaporization atomic absorption

“…Several other reactions appear to have analytical potential (7, [14][15][16][17] vide the basis for analytical applications not possible with luminol.…”

“…Heated vaporization atomic absorption (HVAA) has been applied to the direct determination of several metals at trace levels in petroleum (15)(16)(17)(18). The direct determination of manganese at the 10 ng/g level in petroleum using HVAA has been recently reported (19).…”

Laser-induced double resonance fluorescence of lead with graphite tube atomization

“…The furnace characteristics and its operative sequence were described in detail elsewhere (14). The furnace consisted of two water-cooled copper blocks mounted on a Bakelite support in order to hold the graphite tube and provide electrical contact which was assured by two stainless steel plates screwed into the top of the copper blocks.…”