GB/T 1621-2008

GB/T 210.1-2004 Specification and determination methods of sodium carbonate for industrial use--Part 1:sodium carbonate for industrial use GB/T 3502-1983 Technical requirements of super fine palladium oxide powder GB/T 3501-1983 Technical requirements of super fine ruthenium dioxide hydrate powder GB/T 6275-1986 Ammonium hydrogen carbonate for industrial use GB/T 8156.10-1987 Aluminium fluoride for industrial use--Determination of sulphur content--X-ray fluorescence spectrometric method GB/T 8155-1987 Preparation and storage of test samples of aluminium fluoride for industrial use GB/T 8156.1-1987 Methods for chemical analysis of aluminium fluoride for industrial use--The gravimetric method for the determination of moisture content GB/T 8156.8-1987 Methods for chemical analysis of aluminium fluoride for industrial use--The barium sulphate gravimetric method for the determination of sulphate content