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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 34.2-2011 Method for chemical analysis of the high-purity arsenic—Predicating method for determinating the concentration of selenium 120.0 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GB 4700.4-1984 15.0 via email in 1~3 business day superseded
YS/T 37.3-1992 45.0 via email in 1~3 business day superseded
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
GB 2139-1980 30.0 via email in 1~3 business day superseded
YS/T 37.4-1992 75.0 via email in 1~3 business day superseded
YS/T 980-2014 165.0 via email in 1~3 business day valid
GB/T 4059-2007 Polycrystalline silicon—Examination method—Zone-melting on phosphorus under controlled atmosphere 120.0 via email in 1~3 business day valid
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 34.3-2011 Method for chemical analysis of the high-purity arsenic—Predicating method for determinating the concentration of sulfur 120.0 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azurol S--Cetyl trimethyl ammonium bromide absorption photometric method 30.0 via email in 1~3 business day superseded
GB 2142-1980 15.0 via email in 1~3 business day superseded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
SN/T 1039-2002 Method for the sampling and sample preparation of silicon carbide packed in metricton bags for import and export 150.0 via email in 1~3 business day valid
GB/T 4700.1-1984 Methods for chemical analysis of calcium-silicon;The perchloric acid dehydration-gravimetric method for the determination of silicon 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 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
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