Abstract

A deeper insight into the collection mechanism of an electrostatic accumulation furnace for electrothermal atomic spectrometry has been obtained. It has been found that the electrostatic filter operates in the “Trichel pulses” region and that most of the captured species are accumulated in a region 3–4 mm wide centered around the tip of the active electrode. The capture efficiency, evaluated by direct particles counting, can be easily raised to over 99% and is mainly related to the quantity of charge acquired by a particle within the “active volume” of the electrostatic precipitator.

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