ATOMIC EMISSION METHOD WITH INDUCTIVELY COUPLED PLASMA FOR DETERMINING OF NOBLE METALS (Au, Ag) IN SAMPLES OF INDUSTRIAL BLISTER COPPER
Ключевые слова:
blister copper, noble metals, melting, gold, silver, atomic emission, inductively coupled plasmaАннотация
In the article weare presenting the results of investigation of AES ISP method for Au and Ag
determination in samples of industrial blister copper. The developed method allows determining Au in the range 28-
56 g/ton, Ag – 2000-3000 g/ton. Control of precision was conducted using control analytical method (assaygravimetric) as well as using measurement of state standard sample of copper content with attested values of
impurities. The developed method is not inferior in metrological characteristics to control analytical method. Optimal
spectral lines for Au – 242,795 nm and for Ag – 328,068 nm were selected because they have the most sensitivity
and do not have spectral noises. Statistical processing of calibration characteristics for AES ISP determination of Ag
and Au was conducted in accordance to RIS 54-2002. As a result, values of average standard relative deviations, the
ratio of the average squared deviations and quantile of distribution were obtained. Parameters of precision,
correctness, repeatability, reproducibility of the method were calculated according to RIS 61-2013.
