GB/T 223.37-1989
AbolishedMethods for chemical analysis of iron，steel and alloy--The indophenol blue photometric method for the determination of nitrogen content after distillation separation
钢铁及合金化学分析方法 蒸馏分离-靛酚蓝光度法测定氮量
Application Summary AI generated
This standard specifies the indophenol blue photometric method for determining nitrogen content in iron, steel, and alloys after distillation separation. It is applied in metallurgical laboratories and quality control settings for chemical analysis of ferrous materials, particularly when precise nitrogen quantification is required for product specification or research. The method is used across steelmaking, alloy production, and materials testing industries to ensure compliance with compositional standards.
Related Standards
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Permissible tolerances for chemical composition of steel products
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GB/T 718-2005
Foundry pig iron
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GB/T 4186-2002
Molybdenum-tungsten alloy rods
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Tungsten-rhenium alloy wires
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Coking viscous oil products--Determination ofdistillation range
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.