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GB/T 15076.7-1994 Methods for chemical analysis of tantalum and niobium-Determination of phospherus content in niobium 45.0 via email in 1~3 business day valid
GB/T 12690.27-1990 Rare-earth metals and their oxides-Determination of ignition loss-Gravimetric method 15.0 via email in 1~3 business day abolished
GB/T 2967-1989 Cast tungsten carbide 30.0 via email in 1~3 business day abolished
YS/T 1011-2014 105.0 via email in 1~3 business day valid
GB/T 15076.11-1994 Methods for chemical analysis of tantalum and niobium-Determination of arsenic antimony,lead,tin and bismuth contents in niobium 60.0 via email in 1~3 business day valid
GB/T 2592.4-1981 Thallium;Determination of zinc content;Dithizone extraction photometric method 30.0 via email in 1~3 business day abolished
YS/T 520.8-2007 Chemical analysis of gallium Part 8 Determination of indium content The ethyl violet spectrophotometric method 90.0 via email in 1~3 business day valid
YS/T 281.2-2011 Mehtods for chemical analysis of cobalt--Part 2:Determination of aluminum content--Chromeszurol S spectrophotometry 120.0 via email in 1~3 business day valid
GB/T 1422-1989 Iridum powder 105.0 via email in 1~3 business day abolished
YS/T 554-2006 Lithium niobate single crystals 135.0 via email in 1~3 business day abolished
YS/T 520.10-2006 Methods for chemical analysis of gallium The atomic absorption spectrophotometric method for the determination of zine content 60.0 via email in 1~3 business day abolished
GB/T 15072.13-1994 Silver alloys-Determination of cerium content 15.0 via email in 1~3 business day abolished
YS/T 281.14-2011 Methods for chemical analysis of cobalt- Part 14:Determination of carbon content-Infra-red absorption method after high frequency induction furnace combustion 90.0 via email in 1~3 business day valid
YS/T 281.11-2011 Methods for chemical analysis of cobalt- Part 11:Determination of copper and manganese contents-Flame atomic absorption spectrometery 105.0 via email in 1~3 business day valid
YS/T 349.3-2010 Methods for chemical analysis of cobalt sulfide concentrate—Part 3:Determination of manganese content—Flame atomic absorption spectrometry 120.0 via email in 1~3 business day valid
YS/T 281.16-2011 Methods for chemical analysis of cobalt- Part 16:Determination of arsenic cadmium copper zinc.lead bismuth tin antimony silicon manganese iron nickel aluminum and magnesium content-Direct current arc atomic emission spectrometery 225.0 via email in 1~3 business day valid
GB/T 14842-1993 Niobium rods and bars 90.0 via email in 1~3 business day abolished
YS/T 536.3-2009 Methods for chemical analysis of bismuth—Determination of antimony content—Melachite green photometric method 120.0 via email in 1~3 business day valid
GB/T 11071-2006 Zone-refined germanium ingot 150.0 via email in 1~3 business day valid
GB/T 11067.1-2006 Methods for chemical analysis of silver - Determination of silver content - Silver chloride precipitation-Flame atomic absorption spectrometric method 90.0 via email in 1~3 business day valid
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