TY CONF TI STUDY OF THE EFFECT OF HUMIC SUBSTANCES ON THE POSITION OF CALIBRATION GRAPHS IN THE DETERMINATION OF SILICON IN WATER BY HIGH-RESOLUTION ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY WITH A CONTINUOUS SPECTRUM SOURCE KW spectrometry KW ETAAS KW silicon KW calibration curve KW water KW continuous spectrum source JO Process Management and Scientific Developments AU Shtin, T.N. AU Neudachina, L.K. AU Shtin, S.A. PY 2024 PB AUS PUBLISHERS