HB/Z 5089.6-2004 Methods for analysis of plating black nickel solutions Part 6:Determination of boric acid content by potentiometric titrimetric method (English Version)
2004HB/Z 5089.2-2004 Methods for analysis of plating black nickel solutions Part 2:Continual determination of nickel sulfate and zinc sulfate content by magnesium sulfate back titrmetric EDTA volumetric method
HB/Z 5089.6-2004 Methods for analysis of plating black nickel solutions Part 6:Determination of boric acid content by potentiometric titrimetric method has been changed from HB/Z 5089-1978 .