Physical characterization of the helium-oxygen-acetylene flame as an atom cell for atomic spectrometry

Abstract

Physical characterization of a helium-oxygen-acetylene flame supported on a water-cooled burner has shown the flame to possess a high degree of laminarlty and a maximum safe operating temperature of 2760 K (with 60% helium diluent).Safe operating conditions for the flame have been established to enable Its safe and flashback-free operation. In addition, the spectral background of the flame has been examined and found to be relatively low compared to other high temperature flames, suggesting its use as a promising alternative atom cell for atomic emission, absorption, or fluorescence spectrometry.

Comparison of atomic fluorescence power efficiencies for the helium-oxygen-acetylene and air-acetylene flames

“…The improvements in emission detection limits for the heliumdiluted flame listed in Table 5 correspond closely to increases in atomization efficiency by that flame (2 ). This atom formation efficiency is in the general order Ca>Ba>Sr>Cr>Fe~Cu.…”

“…This increase can be attributed entirely to the enhanced production of calcium atoms in the helium-diluted fl ame (2) .…”

“…The construction of the capillary burner used in this study has been previously described ( 2 ). However, a corn-P ponent used to support an inert-gas sheath has been added to the burner assembly.…”

Atomic fluorescence spectrometry. Present status and future prospects

“…Recently work has been done with Ar-02-C2H2 (20) and He-02-C2H2 (21) flames. By changing the Ar(He)/02 ratio, good control can be exercised over the flame composition and temperature.…”

Atomic Fluorescence Spectrometry

“…Recently work has been done with Ar-02-C2H2 (20) and He-C>2-C2H2 (21) flames. By changing the Ar(He)/02 ratio, good control can be exercised over the flame composition and temperature.…”