APPLICATION OF ANALYSES ON THE BASIS OF CHARACTERISTIC MASS - DETERMINATIONS OF INDIUM, SILVER AND THALLIUM IN DRAINAGE SEDIMENT AND GEOCHEMICAL SAMPLES

When Pd and EDTA ammonium salt are used as a common matrix modifier, t he establishment of a common furnace programme for the determinations of indium, silver and thallium would greatly simplify routine analysis . The continuous determination of indium, silver and thallium by the a nalyses on the basis of characteristic mass and the graphite furnace w ith the V-shaped boat is described. The possibility of the proposed me thod for application to continuous determination of indium, silver and thallium in real sample is discussed. The continuous determination of indium, silver and thallium in drainage sediment and geochemical samp les by the analyses on the basis of characteristic mass is carried out and the results of sample analyses are in good agreement with the exp ected values.