组合使用关键词、标准类型、状态与 ICS 分类，快速定位所需国家标准。
找到 485 条
GB/T 14352.21-2021
Methods for chemical analysis of tungsten ores and molybdenum ores—Part 21：Determination of arsenic content—Hydride generation atomic fluorescence spectrometry
GB/T 14352.20-2021
Methods for chemical analysis of tungsten ores and molybdenum ores—Part 20：Determination of niobium, tantalum, zirconium, hafnium and 15 rare earth elements content—Inductively coupled plasma mass spectrometry
GB/T 14352.19-2021
Methods for chemical analysis of tungsten ores and molybdenum ores—Part 19：Determination of bismuth，cadmium，cobalt，copper，iron，lithium，nickel，phosphorus，lead，strontium，vanadium and zinc content—Inductive-coupled plasma atomic emission spectrophotometry（I
GB/T 38812.3-2020
Direct reduced iron—Determination of silicon, manganese, phosphorus, vanadium, titanium, copper, aluminum, arsenic, magnesium, calcium, potassium and sodium content—Inductively coupled plasma atomic emission spectrometric method
GB/T 38812.2-2020
Direct reduced iron—Determination of metallic iron content—The potassium dichromate titrimetric method after decomposition of sample by ferric chloride
GB/T 38812.1-2020
Direct reduced iron—Determination of iron(Ⅱ) content—The potassium dichromate titrimetric method after decomposition of sample by ferric chloride
GB/T 8454-2020
Reduced ilmenite powder for welding rob—Determination of ferrous iron content—Potassium dichromate titrimetric method
GB/T 6730.82-2020
Iron ores—Determination of barium content—EDTA titrimetric method
GB/T 6730.81-2020
Iron ores—Determination of multiple trace elements—Inductively coupled plasma mass spectrometric method
GB/T 20899.1-2019
Methods for chemical analysis of gold ores—Part 1:Determination of gold content
GB/T 7739.3-2019
Methods for chemical analysis of gold concerntrates—Part 3:Determination of arsenic content
GB/T 7739.2-2019
Methods for chemical analysis of gold concentrates—Part 2:Determination of silver content—Flame atomic absorption spectrometric method
GB/T 7739.1-2019
Methods for chemical analysis of gold concerntrates—Part 1：Determination of gold and silver contents
GB/T 20899.3-2019
Methods for chemical analysis of gold ores—Part 3:Determination of arsenic content
GB/T 20899.2-2019
Methods for chemical analysis of gold ores一Part 2:Determination of silver content 一Flame atomic absorption spectrometric method
GB/T 14353.21-2019
Methods for chemical analysis of copper ores, lead ores and zinc ores—Part 21: Determination of arsenic content—Hydride generation atomic fluorescence spectrometry
GB/T 14353.20-2019
Methods for chemical analysis of copper ores, lead ores and zinc ores—Part 20 : Determination of rhenium content—Inductively coupled plasma mass spectroscopy
GB/T 14353.19-2019
Methods for chemical analysis of copper ores, lead ores and zinc ores—Part 19: Determination of tin content—Hydride generation atomic fluorescence spectrometry
GB/T 31949-2015
GB/T 31948-2015