GB/T 23772-2009 Inorganic chemicals for industrial use.General method for the determination of total nitrogen content.Nessler's reagent colorimetric method (English Version)
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 23772-2009
Scope
This standard specifies the general method for the determination of total nitrogen content in inorganic chemical products, the method summary, safety tips, general regulations, reagents, instruments, equipment, analysis steps and result calculation of the Nessler reagent colorimetric method. This standard applies to the determination of the total amount of trace inorganic nitrogen compounds (including nitrate, nitrite and ammonium salt) in inorganic chemical products. The detection range is 0.05μg/mL-0.8μg/mL (calculated as N).
GB/T 23772-2009 Referenced Document
GB/T 6682-2008 Water for analytical laboratory use.Specification and test methods
HG/T 3696.2 Inorganic chemicals for industrical use.Preparations of standard and reagent solutions for chemical analysis.Part 2: Preparations of standard solutions for impurity *, 2011-12-20 Update
HG/T 3696.3 Inorganic chemicals for industrical use.Preparations of standard and reagent solutions for chemical analysis.Part 3: Preparations of reagent solutions *, 2011-12-20 Update
GB/T 23772-2009 history
2009GB/T 23772-2009 Inorganic chemicals for industrial use.General method for the determination of total nitrogen content.Nessler's reagent colorimetric method