Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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GB 8220.8-1987 Methods for chemical analysis of bismuth--The diotillation-mercuric thiocyanate photometric method for the determination of chlorine content $45.00 via email in 1~3 business day superseded
GB 8220.9-1987 Methods for chemical analysis of bismuth--The oscillopolarographic method for the determination of tellurium content $45.00 via email in 1~3 business day superseded
GB 8550.1-1987 Copper-nickel alloys--Determination of copper content--Electrolytic-flame atomic absorption spectrophotometric method $60.00 via email in 1~3 business day superseded
GB 8550.10-1987 Copper-nickel alloys--Determination of lead content--Flame atomic absorption spectrophotometric method $60.00 via email in 1~3 business day superseded
GB 8550.11-1987 Copper-nickel alloys--Determination of bismuth content--Potassium iodide-brucine spectrophotometric method $45.00 via email in 1~3 business day superseded
GB 8550.12-1987 Copper-nickel alloys--Determination of phosphorus content--Extraction-molybdenum blue spectrophotometric method $45.00 via email in 1~3 business day superseded
GB 8550.13-1987 Copper-nickel alloys--Determination of tin content--Phenylfluorone-cetyl trimethyl ammonium bromide ternary complex spectrophotometric method $30.00 via email in 1~3 business day valid
GB 8550.14-1987 Copper-nickel alloys--Determination of antimony content--Crystal violet spectrophotometric method $45.00 via email in 1~3 business day superseded
GB 8550.15-1987 Copper-nickel alloys--Determination of arsenic content--Silver diethyl-dithiocarbamate spectrophotometric method $45.00 via email in 1~3 business day superseded
GB 8550.16-1987 Copper-nickel alloys--Determination of iron content--1, 10-phenanthroline spectrophotometric method $45.00 via email in 1~3 business day superseded
GB 8550.17-1987 Copper-nickel alloys--Determination of manganese content--Potassium periodate spectrophotometric method $45.00 via email in 1~3 business day superseded
GB 8550.18-1987 Copper-nickel alloys--Determination of sulfur content--Potentiometric titration method after distillation $60.00 via email in 1~3 business day valid
GB 8550.19-1987 Copper-nickel alloys--Determination of carbon content--Infra-red absorption method after high frequency induction furnace combustion $45.00 via email in 1~3 business day valid
GB 8550.2-1987 Copper-nickel alloys--Determination of nickel content--Na2EDTA titrimetric method $60.00 via email in 1~3 business day superseded
GB 8550.20-1987 Copper-nickel alloys--Determination of silicon content--Molybdenum blue spectrophotometric method $45.00 via email in 1~3 business day superseded
GB 8550.21-1987 Copper-nickel alloys--Determination of silicon content--Extraction-molybdenum blue spectrophotometric method $45.00 via email in 1~3 business day superseded
GB 8550.3-1987 Copper-nickel alloys--Determination of manganese content--Ammonium ferrous sulfate titrimetric method $30.00 via email in 1~3 business day superseded
GB 8550.4-1987 Copper-nickel alloys--Determination of iron content--Potassium dichromate titrimetric method $45.00 via email in 1~3 business day superseded
GB 8550.5-1987 Copper-nickel alloys--Determination of lend content--Na2EDTA titrimetric method $60.00 via email in 1~3 business day superseded
GB 8550.6-1987 Copper-nickel alloys--Determination of aluminium content--Flame atomic absorption spectrophotometric method $60.00 via email in 1~3 business day superseded
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