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HG/T 3921-2006 Chemical reagent-Regulations for sampling and acceptance (USD) via email in 1-3 business day VALID
GB/T 9728-1988 Chemical reagent-General method for the determination of sulphate (USD) via email in 1-3 business day ABOLISHED
GB/T 6912.2-1986 Methods for analysis of water for boiler and for cooling; The determination of nitrates and nitrites; Ultraviolet spectrophotometry for nitrites (USD) via email in 1-3 business day ABOLISHED
GB/T 9723-1988 Chemical reagent-General rules for flame atomic absorption spectrometry (USD) via email in 1-3 business day ABOLISHED
GB/T 9727-2007 Chemical reagent—General method for the determination of phosphate (USD) via email in 1-3 business day VALID
GB 605-1988 Chemical reagent-General method for the measurement of colour(in Hazen units) (USD) via email in 1-3 business day ABOLISHED
GB/T 609-2006 Chemical reagent - General method for the determination of total nitrogen via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 9722-1988 Chemical reagent-General rules for the gas chromatography (USD) via email in 1-3 business day ABOLISHED
GB/T 6905.2-1986 Methods for analysis of water for boiler and for cooling; The determination of chloride; Potentiometric titration (USD) via email in 1-3 business day ABOLISHED
GB/T 617-1988 Chemical reagent-General method for the determination of melting range (USD) via email in 1-3 business day ABOLISHED
GB/T 9730-2007 Chemical reagent—General method for the determination of oxalates (USD) via email in 1-3 business day VALID
GB/T 15356-1994 Chemical reagent-General rules for the determination of nucleotides via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 604-1988 Chemical reagent--General method for the determination of pH ranges corresponding the colour transition of acid-base indicators (USD) via email in 1-3 business day ABOLISHED
GB/T 2921-1982 Chemical reagents;Classification and nomenclature of liquid stationary phase for gas chromatography (USD) via email in 1-3 business day ABOLISHED
GB/T 605-2006 Chemical reagent - General method for the measurement of colour via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 9726-2007 Chemical reagent—General rule for the determination of permanganate-reducing substances (USD) via email in 1-3 business day VALID
GB/T 6909.1-1986 Methods for analysis of water for boiler and for cooling; The determination of hardness; High hardness (USD) via email in 1-3 business day ABOLISHED
GB/T 9725-2007 Chemical reagent—General rule for potentiometric titration (USD) via email in 1-3 business day VALID
GB/T 616-2006 Chemical reagent - General method for the determination of boiling point via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB 9725-1988 Chemical reagent-General rules for potentiometric titration (USD) via email in 1-3 business day ABOLISHED
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