2008GB/T 223.23-2008 Iron,,steel and alloy.Determination of nickel content.The dimethylglyoxime spectrophotometric method
1994GB/T 223.23-1994 Methods for chemical analysis of iron, steel and alloy.The dimethylglyoxime spectrophotometric method for the determination of nickel content
1982GB 223.23-1982 Chemical analysis of iron,steel and alloy--The determination of nickel by dimethylglyoxime photometric method
GB 223.23-1982 Chemical analysis of iron,steel and alloy--The determination of nickel by dimethylglyoxime photometric method was changed to GB/T 223.23-1994 Methods for chemical analysis of iron, steel and alloy.The dimethylglyoxime spectrophotometric method for the determination of nickel content.