GB/T 4372.1-1984 Methods for chemical analysis of zinc oxide(direct process)--The potassium ferrocyanide volumetric method for the determination of zinc oxide content
2014GB/T 4372.1-2014 Methods for chemical analysis of zincoxide produced by direct process.Part 1:Determination of zinc oxide content.Na<下标2>EDTA titration method
2001GB/T 4372.1-2001 Methods for chemical analysis of zinc oxide produced by direct process--Determination of zinc oxide content-Na2EDTA titration method
1984GB/T 4372.1-1984 Methods for chemical analysis of zinc oxide(direct process)--The potassium ferrocyanide volumetric method for the determination of zinc oxide content