ANALYSES WITHOUT CALIBRATION CURVE FOR DETERMINATION OF INDIUM IN SEDIMENT AND GEOCHEMICAL SAMPLES

Influences of atomization temperatures on the characteristic mass and the atomic absorption coefficient of indium were studied. The results show that the values of characteristic mass obtained from the wall, us ing the platform and the V-shaped boat have appeared to be stable to b etter than 10, 6 and 12% in the range of 1600-2400-degrees-C, respecti vely. The determination of indium without calibration curve by furnace with the V-shaped boat using palladium and ammonium salt of EDTA as a matrix modifier are described. The proposed method was applied to the determination of indium in standard sediment and geochemical referenc e samples and satisfactory results were obtained.