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GB/T 15249.5-2009 Methods for chemical analysis of crude gold - Part 5: Determination of mercury content - Cold atomic absorption spectrometry 90.0 via email in 1~3 business day valid
YS/T 540.5-2006 Vanadium -- Determination of iron content -- Isoanyl alcohol extraction spectrophotometric method 30.0 via email in 1~3 business day valid
YS/T 520.1-2007 Chemical analysis of gallium Part 1 Determination of copper content The 2 9-dimethyl-4 7-diphenyl-1 10-phenanthroline spectrophotometric method 90.0 via email in 1~3 business day valid
GB/T 2592.9-1981 Thallium;Determination of silicon content;Isoamyl alcohol extraction molybdenum blue absorption photometric method 15.0 via email in 1~3 business day abolished
GB/T 4134-2003 Gold ingots 90.0 via email in 1~3 business day superseded
GB/T 14634.1-1993 Measuring methods of rare-earth phosphorus with red green blue luminescence for fluorescent lamp--Measuringmethod of relative brightness 15.0 via email in 1~3 business day abolished
YS/T 540.2-2006 Vanadium -- Determination of chromium content -- Diphenylcarbazide spectrophotometric method 45.0 via email in 1~3 business day valid
YS/T 710.5-2009 Method for chemical analysis of cobalt oxide - Part 5: Determination of silicon content - Molybdenum blue spectrophotometry 105.0 via email in 1~3 business day valid
GB/T 4375.1-1984 Methods for chemical analysis of gallium;The 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline photometric method for the determination of copper content 30.0 via email in 1~3 business day abolished
GB/T 8639.4-1988 Vanadium; Determination of iron content; Phenanthroline spectrophotometric method 30.0 via email in 1~3 business day superseded
YS/T 536.5-2009 Methods for chemical analysis of bismuth—Determination of zinc content—Solid-liquid extraction-flame atomic absorption spectrophotometric method 120.0 via email in 1~3 business day valid
GB/T 4310-1984 Vanadium 30.0 via email in 1~3 business day superseded
YS/T 520.12-2006 Methods for chemical analysis of gallium The spectrochemical method for the determination of lead coper nickel aluminum indium and zinc contents 60.0 via email in 1~3 business day superseded
YS/T 281.4-2011 Methods for chemical analysis of cobalt—Part 4:Determination of arsenic content—Molybdenum blue spectrophotometry 120.0 via email in 1~3 business day valid
GB/T 12690.21-1990 Rare-earth metals and their oxides--Determination of phosphorus content--Molybdenum blue spectrophotometric method 30.0 via email in 1~3 business day abolished
GB/T 11066.2-1989 Gold-Determination of silver content-Flame atomic absorption spectometric method 45.0 via email in 1~3 business day abolished
GB/T 1419-1989 Sponge platinum 260.0 via email in business day abolished
GB/T 13747.17-1992 and zirconium alloys - Determination of cadmium content-Oscillopolarographic method 30.0 via email in 1~3 business day superseded
GB/T 2592.7-1981 Thallium;Determination of aluminum content;Chromazurol S photometric method 15.0 via email in 1~3 business day abolished
GB/T 2592.3-1981 Thallium;Determination of mercury content;Dithizone-carbon tetrachloride extraction photometric method 30.0 via email in 1~3 business day abolished
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