GB/T 32784-2016
Pig iron contenting nickel—Determination of chromium content—Ammonium per sulfate-ammonium ferrous sulfate titration method
YB/T 4908.1-2021
Vanadium-aluminum alloy-Determination of vanadium content-Ammonium persulfate oxidation-ammonium ferrous sulfate titrimetric method
DB37/T 2735-2015
YB/T 4218-2010
Vanadium pentoxide-Determination of vanadium pentoxide content-The ammonium persulfate oxidation titrimetric method
SN/T 3810-2014
Determination of nitrogen content in urea and ammonium sulphate - X-ray fluorescence spectrometry
GB/T 4699.2-2008
Ferrochromium and ferrosilicochromium - Determination of chromium content - The ammonium persulfate oxidation titrimetric method and potentiometric titration method
DB51/T 2037-2015
HB 5220.15-2008
Methods for chemical analysis of superalloys-Part 15:Determination of chromium content by ammonium persulfate oxidation-ammonium iron (Ⅱ) volumetric method
HB/Z 5107.8-2004
Methods for analysis of chemical oxidation solution for magnesium alloy-Part 8:Determination of ammonia sulfate contentin glacial acetic acid oxidation solution by barium sulfate gravimetric method
HB/Z 5107.14-2004
Methods for analysis of chemical oxidation solution for magnesium alloy-Part 14:Determination of ammonia sulfate content in potassium bichromate and magnesium sulfate oxidation solution by potentiometric method
YS/T 807.4-2012
Chemical analysis methods of aluminum hardeners—Part 4:Determination of chromium content—The ammonium persulfate oxidation-ammonium ferrous sulfate titrimetric method
KS M ISO 3332-2017
Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
KS M ISO 3332-2017(2022)
Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
KS M ISO 2992-2017(2022)
Ammonium sulphate for industrial use — Determination of iron content — 2,2'-bipyridyl photometric method
KS M ISO 2992-2017
Ammonium sulphate for industrial use — Determination of iron content — 2,2'-bipyridyl photometric method
\u0413\u041e\u0421\u0422 29336-92
Ammonium sulphate for industrial use. Determination of free acid content. Titrimetric method
20231327-T-605
Ferrochromium, silicochromium, nitrogen-bearing ferrochromium and high nitrogen ferrochromium-Determination of chromium content-The ammonium persulfate oxidation titrimetric method and potentiometric titration method
GB/T 535-2020
Fertilizer grade ammonium sulphate
GB/T 1396-2015
Chemical reagent—Ammonium sulfate
GB/T 655-2011
Chemical reagent - Ammonium persulfate