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GB/T 223.16-1991 Methods for chemical analysis of iron, steel and alloy The chromotropic acid photometric method for the determination of titanium content via email in 1-3 business day please email coc@codeofchina.com for quotation
GB/T 4325.23-1984 Methods for chemical analysis of molybdenum;The combustion-conductometric titration method for the determination of sulphur content (USD) via email in 1-3 business day ABOLISHED
GB/T 4325.12-1984 Methods for chemical analysis of molybdenum;The chloritization-molybdenum blue photometric method for the determination of silicon content (USD) via email in 1-3 business day ABOLISHED
GB 8654.8-1988 Methods for chemical analysis of manganese metal; The infrared absorption method for the determination of carbon content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.6-1994 Methods for chemical analysis of iron,steel and alloy The neutralization titrimetric method for the determination of boron content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB 223.63-1988 Methods for chemical analysis of iron, steel and alloy; The sodium(potassium)periodate photometric method for the determination of manganese content (USD) via email in 1-3 business day VALID
GB/T 223.78-2000 Methods for chemical analysis of iron,steel and alloy-Curcumin spectrophotometric method for the determination of boron content (USD) via email in 1-3 business day VALID
GB/T 223.30-1994 Methods for chemical analysis of iron, steel and alloy The arsenazo Ⅲ spectrophotometric method for the determination of zirconium content after separation by p-bromomandelic acid via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 4325.18-1984 Methods for chemical analysis of molybdenum;The atomic absorption spectrophotometric method for the determination of potassium content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.49-1994 Methods for chemical analysis of iron, steel and alloy Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare earth content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB 8654.3-1988 Methods for chemical analysis of manganese metal; The molybdenum blue photometric method for the determination of silicon content (USD) via email in 1-3 business day ABOLISHED
GB 223.70-1989 Methods for chemical analysis of iron steel and alloy; The O-Phenanthroline spectrophotometric method for the determination of iron content (USD) via email in 1-3 business day ABOLISHED
GB/T 4325.26-1984 Methods for chemical analysis of molybdenum;The nessler reagent photometric method for the determination of nitrogen content (USD) via email in 1-3 business day ABOLISHED
GB/T 5686.6-1988 Methods for chemical analysis of silicomanganese alloy; The gasometric method for the determination of carbon content (USD) via email in 1-3 business day ABOLISHED
GB/T 4325.25-1984 Methods for chemical analysis of molybdenum;The inert gas fusion-coulometric titration method for the determination of oxygen content (USD) via email in 1-3 business day ABOLISHED
GB/T 33969-2017 Technical specification for injecting pulverized coal with oxygen-enriched into blast furnace (USD) via email in 1-3 business day VALID
GB/T 223.47-1994 Methode for chemical analysis of iron,steel and alloy The carrier precipitation-molybdenum blue potometric method for the determination of antimony content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 4325.14-1984 Methods for chemical analysis of molybdenum;The atomic absorption spectrophotometric method for the determination of calcium content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.69-1997 Methods for chemical analysis of iron,steel and alloy The gas- volumetric method after combustion in the pipe furnace for the determination of carbon content via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 223.5-1997 Methods for chemical analysis of iron,steel and alloy The reduced molybdosilicate spectrophotometric method for the determination of acid-soluble silicon content via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
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