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YS/T 519.2-2009 Methods for chemical analysis of arsenic Part 2: Determination of antimony content-Malachite green spectrophotometric method 90.0 via email in 1~3 business day valid
YS/T 227.1-1994 Determination of bismuth content in tellurium--Potassium iodide brucine photometric method 15.0 via email in 1~3 business day abolished
GB 4700.4-1984 15.0 via email in 1~3 business day superseded
YS/T 37.3-1992 45.0 via email in 1~3 business day abolished
YS/T 226.6-2009 Methods for chemical analysis of selenium Part 6: Determination of sulfur content - Diphenylcarbazide spectrophotometry 90.0 via email in 1~3 business day valid
YS/T 37.4-1992 75.0 via email in 1~3 business day abolished
YS/T 226.7-2009 Methods for chemical analysis of selenium Part 7: Determination of magnesium content-Flame atomic absorption spectrometry 90.0 via email in 1~3 business day valid
YS/T 226.4-2009 Methods for chemical analysis of selenium—Part 4:Determination of mercury content—Dithizone-carbon tetrachloride titrated colorimetric-method 120.0 via email in 1~3 business day valid
YS/T 226.4-1994 Determination of aluminum content in selenium--Chrome azurol S--Cetyl trimethyl ammonium bromide absorption photometric method 30.0 via email in 1~3 business day superseded
YS/T 226.2-2009 Methods for chemical analysis of selenium - Part 2: Determination of antimony content - Hydride generation-atomic fluorescence spectrometry 90.0 via email in 1~3 business day valid
GB 4298-1984 The activation analysis method for the determination of elemental impurities in semiconductor silicon materials 210.0 via email in 1~3 business day valid
YS/T 226.3-2009 Methods for chemical analysis of selenium Part 3:Determination of aluminum content-Chrome azurol S-Cetyl trimethyl ammonium bromide absorption photometric method 120.0 via email in 1~3 business day valid
GB/T 4373.3-1984 Methods for chemical analysis of arsenic;The barium sulphate gravimetric method for the determination of sulphur content 15.0 via email in 1~3 business day abolished
GB/T 14849.2-1993 Silicon metal--Determination of aluminium content--Chrome azurol S spectrophotometric method 30.0 via email in 1~3 business day superseded
GB 2124-1980 15.0 via email in 1~3 business day valid
GB 2146-1980 15.0 via email in 1~3 business day superseded
GB 2140-1980 15.0 via email in 1~3 business day valid
GB/T 26074-2010 Germanium monocrystal—Measurement of resistivity-DC linear four-point probe 180.0 via email in 1~3 business day valid
GB/T 26067-2010 Standard test method for dimensions of notches on silicon wafers 180.0 via email in 1~3 business day valid
YS/T 226.5-2009 Methods for chemical analysis of selenium—Part 5:Determination of silicon content—Molybdenum blue spectrophotometric method 120.0 via email in 1~3 business day valid
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