Standard Code | Standard Title | Standard Class | Order |
---|---|---|---|
GB/T 23952-2009 |
Inorganic chemicals for industrial use - General method for the determination of total nitrogen content - Distillation-acid-base titrations method 无机化工产品中总氮含量测定的通用方法 蒸馏-酸碱滴定法 |
China National Standards Industrial Nitrogen |
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GB/T 23772-2009 |
Inorganic chemicals for industrial use - General method for the determination of total nitrogen content - Nessler’s reagent colorimetric method 无机化工产品中总氮含量测定的通用方法 蒸馏-纳氏试剂比色法 |
China National Standards Industrial Nitrogen |
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GB/T 3864-2008 |
Industrial Nitrogen 工业氮 |
China National Standards Industrial Nitrogen |
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