Повучен
Alkaline fusion of a test portion by sodium carbonate and subsequent neutralization by sulphuric acid. Measurement of the absorption of the complex formed by chromium and diphenylcarbazide at a wavelength of abour 540 nm after adding sodium azide for elimination of the colour caused by manganese.
ПОВУЧЕН
ISO 3119:1976
95.99
Повучен
27. 5. 2002.
Ispitivanje tehničke borne kiseline, tehničkog bor-oksida i tehničkih dinatrijum-tetraborata - Određivanje sadržaja hroma - Fotometrijska metoda
95.99 Повучен