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Standards GB - Chinese national standards - Page 5557
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 11446.3-1997
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Generic rules for test methods of electronic grade water
WITHDRAWN published on 1.9.1997
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GB 11446.4-1989
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Test method for resistivity of electronic grade water
WITHDRAWN published on 1.1.1989
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GB/T 11446.4-1997
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Test methods for resistivity of electronic grade water
WITHDRAWN published on 1.9.1997
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GB 11446.5-1989
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Test method for measuring trace metals in electronic grade water by atomic absorption spectrophotometry
WITHDRAWN published on 1.1.1989
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GB/T 11446.5-1997
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Test method for measuring trace metals in electronic grade water by atomic absorption spectrophotometry
WITHDRAWN published on 1.9.1997
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GB 11446.6-1989
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Test method for silica in electronic grade water by spectrophotometer
WITHDRAWN published on 1.1.1989
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GB/T 11446.6-1997
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Test method for SiO2 in electronic grade water by spectrophotometer
WITHDRAWN published on 1.9.1997
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GB 11446.7-1989
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Test method for trace chloride in electronic grade water by lon chromatography
WITHDRAWN published on 1.1.1989
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GB/T 11446.7-1997
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Test method for trace chloride, nitrate, phosphate, sulfate in electronic grade water by ion-chromatography
WITHDRAWN published on 1.9.1997
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GB 11446.8-1989
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Test method for total and organic carbon in electronic grade water
WITHDRAWN published on 1.1.1989
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