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3. GOST 54920-2012. Zinc Concentrates. Atomic Absorption Method for Determination of Copper, Lead, Cadmium, Cobalt, Iron, Potassium, Sodium, Gold, Silver, Indium, Calcium and Magnesium (Stadinform, Moscow, 2014), pp. 18–19 (in Russian).
4. A. A. Pupyshev, Atomic Absorption Spectral Analysis (Tekhnosfera Publ., Moscow, 2009), pp. 439–452, (in Russian).
5. Determination of bismuth, indium and lead in geological and sea-water samples by electrothermal atomic absorption spectrometry with nickel-containing chemical modifiers