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Standards GB - Chinese national standards - Page 7457
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
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GB/T 8570.5-1988
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Liquefied anhydrous ammonia—Determination of water content—Karl Fischer method
WITHDRAWN published on 3.1.1988
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GB/T 8570.6-1988
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Liquefied anhydrous ammonia—Determination of oil content—Gravimetric and infra-red spectrometric methods
WITHDRAWN published on 3.1.1988
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GB/T 8570.7-1988
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Liquefied anhydrous ammonia—Determination of iron content—-Phenanthroline spectrophotometric method
WITHDRAWN published on 3.1.1988
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GB/T 8571-1988
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Preparation of laboratory samples for compound fertilizers
WITHDRAWN published on 4.1.1988
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GB/T 8571-2002
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Preparation of laboratory samples for compound fertilizers
WITHDRAWN published on 24.9.2002
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GB/T 8572-2001
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Determination of total nitrogen content for compound fertilizers—Titrimetric method after distillation
WITHDRAWN published on 26.7.2001
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GB/T 8573-1999
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Determination of available phosphorus content for compound fertilizers
WITHDRAWN published on 8.6.1999
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GB/T 8573-2010
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Determination of available phosphorus content for compound fertilizers
WITHDRAWN published on 26.9.2010
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GB/T 8574-1988
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Determination of potassium content for compound fertilizers potassium tetraphenylborate gravimetric method
WITHDRAWN published on 4.1.1988
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GB/T 8574-2002
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Determination of potassium content for compound fertilizers—Potassium tetraphenylborate gravimetric method
WITHDRAWN published on 24.9.2002
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