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GB/T 4700.1-1984 Methods for chemical analysis of calcium-silicon;The perchloric acid dehydration-gravimetric method for the determination of silicon content (USD) via email in 1-3 business day ABOLISHED
GB 2113-1980 (USD) via email in 1-3 business day ABOLISHED
SN/T 1039-2002 Method for the sampling and sample preparation of silicon carbide packed in metricton bags for import and export via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
YS/T 226.4-1994 Determination of aluminum content in selenium--Chrome azurol S--Cetyl trimethyl ammonium bromide absorption photometric method (USD) via email in 1-3 business day ABOLISHED
YS/T 226.5-2009 Methods for chemical analysis of selenium—Part 5:Determination of silicon content—Molybdenum blue spectrophotometric method (USD) via email in 1-3 business day VALID
YS/T 227.4-1994 Determination of iron content in tellurium--1 10-phenanthroline photometric method (USD) via email in 1-3 business day ABOLISHED
YS/T 34.3-2011 Method for chemical analysis of the high-purity arsenic—Predicating method for determinating the concentration of sulfur (USD) via email in 1-3 business day VALID
YS/T 519.4-2006 Methods for chemical analysis of arsenic The dithiodiantipyryl methane photometric method for the determination of kismuth content (USD) via email in 1-3 business day ABOLISHED
YS/T 227.9-1994 Determination of tellurium content in tellurium--Potassium dichromate-ammonium ferrous sulfate volumetric method (USD) via email in 1-3 business day ABOLISHED
GB 2143-1980 (USD) via email in 1-3 business day ABOLISHED
YS/T 227.11-1994 Determination of silicon content in tellurium--n-butyl alcohol extraction silicon-molybdenum blue photometric method (USD) via email in 1-3 business day ABOLISHED
GB/T 4700.5-1998 Methods for chemical analysis of calcium-silicon-The infrared absorption method for the determination of carbon content via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
YS/T 226.14-1994 Determination of carbon content in selenium--Combustion conductometric titration method (USD) via email in 1-3 business day VALID
GB 2114-1980 (USD) via email in 1-3 business day ABOLISHED
GB/T 4059-2018 Test method for phosphorus content in polycrystalline silicon by zone-melting method under controlled atmosphere (USD) via email in 1-3 business day VALID
GB 2139-1980 (USD) via email in 1-3 business day ABOLISHED
GB 2111-1980 (USD) via email in 1-3 business day ABOLISHED
YS/T 226.1-2009 Methods for chemical analysis of selenium—Part 1:Determination of bismuth content—Hydride generation-atomic fluorescence spectrometry (USD) via email in 1-3 business day VALID
YS/T 226.6-2009 Methods for chemical analysis of selenium Part 6:Determination of sulfur content-Diphenylcarbazide spectrophotometry (USD) via email in 1-3 business day VALID
YS/T 227.1-1994 Determination of bismuth content in tellurium--Potassium iodide brucine photometric method (USD) via email in 1-3 business day ABOLISHED
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