HG/T 2964-1984
Sodium hydrosulphide for industrial use-Determination of the content of sodium hydrosulphide and sulphide
GB/T 22661.3-2008
Chemical analysis methods of potassium fluoborade - Part 3: Determination of potassium fluoborade content - Distillation-sodium hydrogen oxidizes titration volumetric method
GB/T 22661.8-2008
Chemical analysis methods of potassium fluoborade - Part 8: Determination of free borade content - Distillation-sodium hydrogen oxidizes titration volumetric method