HG/T 2347.5-1992 Determination of magnetic iron oxide/ferrous oxide powder water soluble sulfates in aqueous solution

HG/T 2347.1-1992 magnetic powder of r·Fe2O3 HG/T 2347.2-1992 The method for measuring magnetic properties of magnetic particles of r·Fe2O3 HG/T 2347.3-1992 The determination of the density of magnetic powder (r·Fe2O3) by lightly tapping HG/T 2347.4-1992 The determination of volatile matter of r·Fe2O3 magnetic powder HG/T 2347.6-1992 γ. Determination of water-soluble chloride in magnetic powder of Fe2O3 HG/T 2347.7-1992 Determination of particle size of magnetic powder r·Fe2O3 HG/T 2347.8-1992 The determination of the specific surface area of magnetic powder (r·Fe2O3) is the measurement of the surface area of the magnetic powder particles