GB/T 20975.12-2020
Methods for chemical analysis of aluminium and aluminium alloys—Part 12: Determination of titanium content
GB/T 13748.12-2013
Chemical analysis methods of magnesium and magnesium alloys - Part 12:Determination of copper content
GB/T 5121.12-2008
Methods for chemical analysis of copper and copper alloys - Part 12:Determination of antimony content
DB34/T 2127.12-2014
GB/T 3884.12-2023
Methods for chemical analysis of copper concentrates—Part 12:Determination of fluoride and chloride contents—Ion chromatography and potentiometric titration
YS/T 520.12-2007
Chemical analysis of gallium—Part 12:Determination of lead,copper,nickel,aluminum,indium and zinc content—The spectrochemical method
YS/T 1605.12-2023
YS/T 1171.12-2021
Methods for chemical analysis of recycled zinc material-Part 12: Determination of indium content-Flame atomic absorption spectrometry
GB/T 6150.12-2023
Methods for chemical analysis of tungsten concentrates—Part 12: Determination of silicon dioxide content—Silicomolybdenum blue spectrophotometry and gravimetry
GB/T 3286.12-2023
Methods for chemical analysis of limestone and dolornite—Part 12:Determination of potassium oxide and sodium oxide contents—Flame atomic absorption spectrometry method
YS/T 445.12-2019
Methods for chemical analysis of silver concentrates-Part 12:Determination of chromiunl content-Diphenylcarbazide spectrophotometry
GB/T 6609.12-2018
Chemical analysis methods and determination of physical performance of alumina—Part 12:Determination of zinc oxide content—Flame atomic absorption spectrometry method
GB/T 20975.12-2008
Methods for chemical analysis of aluminium and aluminium alloys—Part 12:Determination of titanium content
HB/Z 5218.12-2004
Methods for chemical analysis of aluminium alloys-Part 12:Determination of nickel content by dimethylglyoxime extraction spectrophotometric method
20232308-T-605
Methods for chemical analysis of fluorspa—Part12: Determination of arsenic content
YS/T 1075.12-2022
HB 5220.12-2008
Methods for chemical analysis of superalloys-Part 12:Determination of manganese content by zion oxide separation--ammonium ferrous volumetric method
YS/T 746.12-2010
Methods for chemical analysis of lead-free tin-based solders—Part 12:Determination of Indium content—Na2EDTA titrimetric method
GB/T 3884.12-2010
Methods for chemical analysis of copper concentrates—Part 12:Determination of fluoride content and chloride content—Ion chromatography
YS/T 1047.12-2020
Methods for chemical analysis of copper magnetite-Part 12:Determination of sulfur content-Inductively coupled plasma atomic emission spectrometry