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Standards GB - Chinese national standards - Page 5758
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 17413.2-1998
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Methods for chemical analysis of Lithium Rubidium and Cesium ores—Determination of Rubidium content—Flame atomic absorption/emission spectrophotometric method
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GB/T 17413.3-1998
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Methods for chemical analysis of LithiumRubidium and Cesium ores—Determination of Cesium content—Flame atomic absorption/emission spectrophotometric method
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GB/T 17414.1-1998
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Method for chemical analysis of beryllium ores—Determination of beryllium content—Eriochrome cyanine R photometric method
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GB/T 17414.2-1998
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Method for chemical analysis of beryllium ores—Determination of beryllium content-catalytic polarographic method
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GB/T 17415.1-1998
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Methods for chemical analysis of Tantalum and Niobium ores—Determination of Tantalum content—Preconcentration and separation with silica gel-Butyl rhodamine B extraction photometric method
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GB/T 17415.2-1998
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Methods for chemical analysis of Tantalum and Niobium ores—Determination of Niobium content—Preconcentration and separation with silica gel—Thiocyanate extraction photometric method
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GB/T 17416.1-1998
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Method for chemical analysis of Zirconium ores—Determination of Zirconium (Hafnium) content—Xylenol orange photometric method
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GB/T 17416.2-1998
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Method for chemical analysis of Zirconium ores—Determination of Zirconium and Hafnium contents—X-ray fluorescence spectrometric method
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GB/T 17417.1-1998
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Method for chemical analysis of rare earth ores—Determination of separated rare earth content—Preconcentration and separation by cation exchange resin,ICP-AES method
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GB/T 17417.2-1998
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Method for chemical analysis of rare earth ores—Determination of scandium content—ICP-AES method
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