Инд. авторы:	Dzyuba A.A., Labusov V.A., Vasil'eva I.E., Shabanova E.V., Babin S.A.
Заглавие:	Analytical capabilities of 'grand-Potok' spectral system for the scintillation determination of gold and silver in geological samples
Библ. ссылка:	Dzyuba A.A., Labusov V.A., Vasil'eva I.E., Shabanova E.V., Babin S.A. Analytical capabilities of 'grand-Potok' spectral system for the scintillation determination of gold and silver in geological samples // Аналитика и контроль. - 2017. - Vol.21. - Iss. 1. - P.6-15. - ISSN 2073-1442. - EISSN 2073-1450.
Внешние системы:	DOI: 10.15826/analitika.2017.21.1.001; SCOPUS: 2-s2.0-85018257109;
Реферат:	eng: Abstact: Introduction. In order to reduce the detection limits of gold in the analysis of powder geological samples, a high-speed multichannel analyzer of emission spectra (MAES) was designed as a combined hybrid assembly consisting of 12 arrays of BLPP-369M1 photodetectors and one more sensitive array of BLPP- 2000 photodetectors. This study aimed to examine the analytical capabilities of a 'Grand-Potok' spectral complex equipped with this analyzer and used the spill-injection method to introduce the sample material into the plasma arc. Experimental part. Tests were carried out on the two identical 'Grand-Potok' systems with a minimum basic exposure of 3ms. The high-sensitivity BLPP-2000 array was set in the spectral range of 258-269 nm. 16 standard samples of rocks, loose sediments, soils, ores and their processing products with a gold content of 0.002 to 34 g/t and a silver content of 0.05 to 34 g/t were tested. Results and its discussion. For the gold determination the relative standard deviation varied from 1.6 to 38% for the ore and industrial standard samples and from 13 to 170% for rocks and soils, and for the silver determination it varied from 1 to 55% for a content range of 4 orders of magnitude. The number of standard samples with overestimated or underestimated total gold and silver contents was approximately the same indicating the possibility of improving the accuracy of scintillation atomic emission spectrometry after identifying systematic error sources. Analysis of the dependence of the amount of particles on the total content showed that with the increasing total content the amount of particles containing gold or silver in powder samples increased monotonically to a concentration of 2 g/m and 0.3 g/m respectively. Starting from these contents, the flashes of analytes were no longer separated in time. Conclusions. Good reproducibility of the results of determination for the total gold and silver contents in mineral raw materials indicated that the method could be certified according to State Standard OST 41-08-205-2004.
Ключевые слова:	Scintillation atomic emission spectrometry; Powder geological samples; Silver; Grand-Potok spectral system; Gold; High-speed multichannel analyzer of emission spectra (MAES);
Издано:	2017
Физ. характеристика:	с.6-15