Determination of Thallium by Graphite Furnace- Atomic Absorption Spectrometry with Atomization Under Pressure

Abstract

Atomization under pressure worsens peak height sensitivity of both the 276.79 and the 377.57 nm resonance lines. Peak area is also worsened as atomization pressure increases, though much less than peak height.

Atomization under pressure alters peak times. Most notable is the prolongation of mean residence time and delay of peak time. As a consequence of this vapor phase interferences are reduced.

Linearity of calibration curves is improved by pressure.