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GB/T 13070-1991 Determination of uranium content in uranium ores by method of potentiometric titration 120.0 via email in 1~3 business day valid
GB/T 6150.14-1985 Methods for chemical analysis of tungsten concentrates; The molybdenum blue photometric method for the determination of silicon dioxide content 30.0 via email in 1~3 business day abolished
GB/T 6150.17-1985 Methods for chemical analysis of tungsten concentrates; The semi-xylenol orange photometric method for the determination of bismuth content 30.0 via email in 1~3 business day abolished
GB/T 17672-1999 Determinations for isotopes of lead, strontium and neodymium in rock samples 105.0 via email in 1~3 business day valid
GB/T 6150.12-1985 Methods for chemical analysis of tungsten concentrates; The hydrochloric acid-sodium chloride supporting electrolyte polarographic method for the determination of lead content 30.0 via email in 1~3 business day abolished
GB 2825-1981 60.0 via email in 1~3 business day valid
GB/T 6150.1-1985 Methods for chemical analysis of tungsten concentrates; The ammonium tungstate igniting gravimetric method for the determination of tungsten trioxide content 45.0 via email in 1~3 business day abolished
GB/T 6150.8-1985 Methods for chemical analysis of tungsten concentrates; The gravimetric method for the determination hygroscopic moisture content 15.0 via email in 1~3 business day abolished
GB/T 6150.5-1985 Methods for chemical analysis of tungsten concentrates; The barium sulfate gravimetric method for the determination of sulfur content 30.0 via email in 1~3 business day abolished
GB/T 6150.16-1985 Methods for chemical analysis of tungsten concentrates; The atomic absorption spectrophotometric method for the determination of manganese content 60.0 via email in 1~3 business day abolished
GB/T 6150.15-1985 Methods for chemical analysis of tungsten concentrates; The silver diethyldithiocarbamate photometric method for the determination of arsenic content 45.0 via email in 1~3 business day abolished
GB/T 6150.13-1985 Methods for chemical analysis of tungsten concentrates; The ammonium hydroxide-ammonium chloride supporting electrolyte polarographic method for the determination of zinc content 30.0 via email in 1~3 business day abolished
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