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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Methods for chemical analysis of iron, steel and alloy--The thiocyanate-butyl acetate extraction photometric method for the determination of molybdenum content
WITHDRAWN published on 1.1.1984
Selected format:Methods for chemical analysis of iron, steel and alloy The thiocyanate-butyl acetate extraction spectrophotometric method for the determination of molybdenum content
WITHDRAWN published on 17.1.1994
Selected format:Methods for chemical analysis of ironsteel and alloy--The xylenol orange photometric method for determination of lead content after carrier precipit-ation
WITHDRAWN published on 27.3.1984
Selected format:-
WITHDRAWN published on 1.1.1984
Selected format:Methods for chemical analysis of iron, steel and alloy--The distillation-molybdenum blue photometric method for the determination of arsenic content
WITHDRAWN published on 1.1.1984
Selected format:Methods for chemical analysis of iron, steel and alloy The distillation-molybdenum blue spectrophotometric method for the determination of arsenic content
WITHDRAWN published on 17.1.1994
Selected format:Methods for chemical analysis of iron, steel and alloy--The hypophosphite reduction-iodimetric method for the determination of arsenic content
WITHDRAWN published on 1.1.1984
Selected format:Methods for chemical analysis of iron, steel and alloy--The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation
WITHDRAWN published on 1.1.1984
Selected format:Methods forchemical analysis of ironsteel and alloy--The pulse heating inert gas fusion-coulometric titration method for the determination of oxygen content
WITHDRAWN published on 18.7.1985
Selected format:Methods for chemical analysis of iron, steel and alloy--The volumetric method for the determination of nitrogen content after distillation separation
WITHDRAWN published on 1.1.1985
Selected format:Latest update: 2026-04-19 (Number of items: 2 274 482)
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