GB/T 11198.1-1989
Sulphuric acid for industrial use--Determination of sulphuric acid content and calculation of free sulphur trioxide content of oleum--Titrimetric method
KS M ISO 910-2004(2024)
Sulphuric acid and oleum for industrial use-Determination of total acidity, and calculation of free sulphur trioxide content of oleum-Titrimetric method
KS M ISO 910-2004(2019)
Sulphuric acid and oleum for industrial use-Determination of total acidity, and calculation of free sulphur trioxide content of oleum-Titrimetric method
GB/T 12496.11-1999
Test methods of wooden activated carbon--Determination of quinine sulpoate adsorption
ISO 3237:1975
Sodium sulphate for industrial use — Determination of sulphates content — Calculation method and barium sulphate gravimetric method
ISO 910:1977
Sulphuric acid and oleum for industrial use — Determination of total acidity, and calculation of free sulphur trioxide content of oleum — Titrimetric method
GB/T 5195.18-2018
Fluorspar—Determination of barium sulfate content—Gravimetric method
UNE 55592:1981
SURFACE ACTIVE AGENTS. SULPHURIC ACID AND OLEUMS FOR USE AS RAW-MATERIALS IN DETERGENTS FORMULATIONS. DETERMINATION OF TOTAL ACIDITY, AND CALCULATION OF FREE SULPHUR TRIOXIDE CONTENT OF OLEUMS. TITRIMETRIC METHOD
GB/T 4701.2-2009
Ferrotitanium - Determination of silicon content - The sulphuric acid dehydration gravimetric method
GB/T 32784-2016
Pig iron contenting nickel—Determination of chromium content—Ammonium per sulfate-ammonium ferrous sulfate titration method
GB/T 6730.29-2016
Iron ores—Determination of barium content—Barium sulfate grarimetric method
GB/T 6730.16-2016
Iron ores—Determination of sulfur content—Barium sulfate gravimetric method
GB/T 4702.1-2016
Chromium metal—Determination of chromium content—The ammonium ferrous sulfate titrimetric method
HG/T 6108-2022
GB/T 4701.1-2009
Ferrotitanium - Determination of titanium content - The ammonium ferric sulfate titration method
YB/T 6013.1-2022
GB/T 11213.5-2006
Sodium hydroxide for chemical fiber use - Determination of sulphate content
YB/T 4566.5-2016
Ferrovanadium nitride-Determination of silicon content-The sulphuric acid dehydration-gravimetric method
DB37/T 2735-2015
YB/T 4908.1-2021
Vanadium-aluminum alloy-Determination of vanadium content-Ammonium persulfate oxidation-ammonium ferrous sulfate titrimetric method