GLUCOSE AS A CHEMICAL MODIFIER FOR THE DETERMINATION OF ANTIMONY AND SELENIUM BY ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY

The effectiveness of glucose as a chemical modifier for the determinat ion of Sb and Se by electrothermal atomic absorption spectrometry has been evaluated. The effect of increasing glucose concentration on the thermal behaviour of both elements and on the graphite tube surface is described. Glucose allows the quantitative stabilization of Sb and Se up to 1300 degrees C compared with 700 degrees C without glucose. Fur thermore, this chemical modifier significantly reduces interference by phosphorous in the determination of Se and by chloride in the determi nation of Sb.