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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GB 4700.4-1984 15.0 via email in 1~3 business day superseded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 37.4-1992 75.0 via email in 1~3 business day abolished
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 abolished
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 abolished
GB 2124-1980 15.0 via email in 1~3 business day superseded
GB 2146-1980 15.0 via email in 1~3 business day superseded
GB 2140-1980 15.0 via email in 1~3 business day superseded
YS/T 226.11-2009 Methods for chemical analysis of selenium Part 11: Determination of lead content-Flame atomic absorption spectrometry 90.0 via email in 1~3 business day valid
GB/T 4373.4-1984 Methods for chemical analysis of arsenic;The dithio-diantipyrylmethane photometric method for the determination of bismuth content 30.0 via email in 1~3 business day abolished
YS/T 226.11-1994 Determination of magnesium copper iron and nickel content in selenium--Atomic absorption spectrophotometric method 45.0 via email in 1~3 business day abolished
GB/T 11073-2007 Standard method for measuring radial resistivity variation on silicon slices 210.0 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
YS/T 227.6-1994 Determination of copper content in tellurium--Neocuproine Chloroform extraction photometric method 15.0 via email in 1~3 business day abolished
YS/T 519.3-2006 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 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 abolished
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
GB/T 19922-2005 Standard test methods for measuring site flatness on silicon wafers by noncontact scanning 150.0 via email in 1~3 business day valid
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