GOST 27566-2020 Superpure substances. Determination of impurities of chemical elements by atomic emission spectrometry methods in liquid-phase substances
2020GOST 27566-2020 Superpure substances. Determination of impurities of chemical elements by atomic emission spectrometry methods in liquid-phase substances
1987GOST 27566-1987 Superpure substances. Method of atomic emission spectroscopy for determination of chemical elements impurities in liquid-phase substances