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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
Workplace air—Determination of mercury—Dithizone spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air-Determination of zinc oxide-Dithizone spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of zinc oxide—Flame atomic absorption spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of cadmium oxide—Flame atomic absorption spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of manganese and its compounds—Phosphoric acid-potassium periodate spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of manganese and its compounds Flame atomic absorption spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of chromium trioxide, chromates and dichromates—Diphenylcarbazide spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of chromium trioxide—Flame atomic absorption spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air-Determination of nickel and its compounds-Flame atomic absorption spectrophotometric method
WITHDRAWN published on 21.12.1995
Selected format:Workplace air—Determination of cobalt and its compounds—Flame atomic absorption spectrophotometric method
WITHDRAWN published on 23.1.1996
Selected format:Latest update: 2025-11-09 (Number of items: 2 243 571)
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