Abstract
The analysis ofPbassociated with air aerosols by its accumulation through electrostatic precipitation directly in a graphite tube, which is subsequently used as an atomizer in electro thermal atomization-atomic absorption spectroscopy (ETA-AAS), has already been tested and found very convenient for its simplicity and speed. However, its use as a practical and useful method of analysis was hampered by the necessity of a laborious and difficult calibration with high risks of systematic errors. These difficulties can be bypassed by resorting to an absolute or standardless method of analysis. Standardless methods of analysis have been proposed for ETA-AAS measurements and recently applied toCdandHg.With the use of a new and more powerful power supply this method has been extended toPbso that a very easy, fast, and almost on line way of measuring the level ofPbin air aerosols is possible. The system presented in this paper is manually operated but its automation, in order to obtain an automatic control station, is only a matter of convenience.
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