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Standards GB - Chinese national standards - Page 8680
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 8648.10-1988
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Cobalt--Determination of nickel content--Flame atomic absorption spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 8648.11-1988
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Cobalt--Determination of copper and manganese content--Flame atomic absorption spectrophotometric method
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GB 8648.12-1988
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Cobalt--Determination of arsenic, antimony, bismuth, tin and lead content--Electrothermal atomic absorption spectrophotometric method
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GB 8648.13-1988
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Cobalt--Determination of sulfur content--Oscillopolarographic method after distillation
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GB 8648.14-1988
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Cobalt--Determination of sulphur content--Infra-red absorption method after high frequency induction furnace combustion
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GB 8648.15-1988
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Cobalt--Determination of carbon content--Infra-red absorption method after high frequency induction furnace combustion
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GB 8648.16-1988
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Cobalt--Determination of carbon content--Combustion-coulometric method
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GB 8648.2-1988
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Cobalt--Determination of aluminium content--Chromazurol S-P-octyl polyethylene glycol phenyl ether-tetradecyl phridinium bromine mixed micellar solubilization spectrophotometric method
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GB 8648.3-1988
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Cobalt--Determination of silicon content--Molybdenum blue spectrophotometric method
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GB 8648.4-1988
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Cobalt--Determination of arsenic content--Molybdenum blue spectrophotometric method
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