Continued Study and Critical Evaluation of an Improved Impaction-Graphite Furnace System for the Determination of Metals in Aerosols¹

Abstract

An evaluation of the parameters which effect the collection efficiency of metals in an aerosol via an improved impaction-graphite furnace atomic absorption spectrometric system showed that an optimum could be obtained at a jet diameter of 1.50 mm, and a jet exit -to-impaction surface distance of 3 mm. Low flow rates gave poor precision at low concentrations except when a large jet diameter was used. Preliminary studies by electron microscopy of particle size collected showed that the higher the flow rate and smaller the jet diameter, leads to a more dense concentration of particle sizes.

¹ Presented, in part, at Pittcon '96, in Chicago, Illinois on March 3–8 th, 1996.

² Permanent address, Department of Chemistry, Konyang University, Nonsan, 320–800, Korea.

Keywords:

• Impaction-GFAAS
• flow rate
• jet diameter
• particle size

Notes

¹ Presented, in part, at Pittcon '96, in Chicago, Illinois on March 3–8 th, 1996.

² Permanent address, Department of Chemistry, Konyang University, Nonsan, 320–800, Korea.