GB/T 661-2011
Chemical reagent - Ammonium iron(II) sulfate hexahydrate
GB/T 664-2011
Chemical reagent - Iron(Ⅱ)sulfate heptahydrate
GB/T 32784-2016
Pig iron contenting nickel—Determination of chromium content—Ammonium per sulfate-ammonium ferrous sulfate titration method
GB/T 4702.1-2016
Chromium metal—Determination of chromium content—The ammonium ferrous sulfate titrimetric method
GB/T 24583.1-2019
Vanadium-nitrogen—Determination of vanadium content—Ammonium ferrous sulfate titration method
GB/T 6730.32-2013
Iron ores - Determination of vanadium content - The ammonium ferrous sulfate titrimetric method
GB 34465-2017
Feed additive—Ferrous sulphate
GB/T 10531-2016
Water treatment chemicals—Ferrous sulphate
GB/T 8704.5-2020
Ferrovanadium—Determination of vanadium content—The ammonium ferrous sulfate titrimetric method and the potentiometric titrimetric method
YB/T 4908.1-2021
Vanadium-aluminum alloy-Determination of vanadium content-Ammonium persulfate oxidation-ammonium ferrous sulfate titrimetric method
GB/T 15555.8-1995
Solid waste--Determination of total chromium--Titrimetric method
GB/T 1506-2016
Manganese ores—Determination of manganese content—Potentiometric method and ammonium iron(Ⅱ) sulphate titrimetric method
GB/T 15555.7-1995
Solid waste--Determination ofchromium(VI)--Titrimetric method
YB/T 4566.3-2016
Ferrovanadium nitride-Determination of vanadium content-Ammonium ferrous sulfate titrimetric method
GB/T 6730.9-2016
Iron ores—Determination of silicon content—The silicomolybdic blue spectrophotometric method reduced by ammonium ferrous sulfate
HG/T 2935-2006
Feed grade ferrous sulfate
GB/T 42513.1-2023
Methods for chemical analysis of nickel alloys—Part 1: Determination of chromium content—Potentiometric titration method with ammonium iron(II) sulfate
GB/T 223.13-2000
Methods for chemical analysis of iron,steel and alloy--The ammonium ferrous sulfate titrationmethod for the determination of vanadium content
YB/T 547.1-2014
Vanadium slag - Determination of vanadium pentoxide content - Ammonium ferrous sulfate titrimetric method
YB/T 4218-2010
Vanadium pentoxide-Determination of vanadium pentoxide content-The ammonium persulfate oxidation titrimetric method