GB/T 3257.11-1999
Abolished
Standards
GB/T 3257.1-1999
Abolished
GB/T 3257.1-1999 Methods for chemical analysis of bauxite—Determination of aluminium oxide content-EDTA titrimetric method
GB/T 3257.12-1999
Abolished
GB/T 3257.12-1999 Methods for chemical analysis of bauxite—Determination of vanadium pentoxide content—N-benzoyl-N-phenythyroxylamine photometric method
GB/T 3257.13-1999
Abolished
GB/T 3257.13-1999 Methods for chemical analysis of bauxite—Determination of zinc content—Flame atomic absorption spectrophotometric method
GB/T 3257.15-1999
Abolished
GB/T 3257.15-1999 Methods for chemical analysis of bauxite—Determination the total content of rare earth oxide—Tribromo-arsenazo photometric method
GB/T 3257.16-1999
Abolished
GB/T 3257.16-1999 Methods for chemical analysis of bauxite—Determination of gallium oxide concent—Rhodamine B-extraction photometric method
GB/T 3257.17-1999
Abolished
GB/T 3257.17-1999 Methods for chemical analysis of bauxite—Determination of phosphorus pentoxide content—Molybdenum blue spectrophotometric method
GB/T 3257.18-1999
Abolished
GB/T 3257.18-1999 Methods for chemical analysis of bauxite—Determination of sulfur content—Direct combustion-iodometric method
GB/T 3257.20-1999
Abolished
GB/T 3257.20-1999 Methods for chemical analysis of bauxite—Determination of total carbon content—Non-aqueous titrametric method after combustion
GB/T 3257.21-1999
Abolished
GB/T 3257.21-1999 Methods for chemical analysis of bauxite—Determination of the loss on ignition—Gravimetric method
GB/T 3257.2-1999
Abolished
GB/T 3257.2-1999 Methods for chemical analysis of bauxite—Determination of silicon dioxide content—Gravimetric—molybdenum blue photometric method
GB/T 3257.22-1999
Abolished