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Standards GB - Chinese national standards - Page 5309
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 6730.77-2019
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Iron ores—Determination of arsenic content—Hydride generation-atomic fluorescence spectrometric method
Standard published on 30.8.2019
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GB/T 6730.78-2019
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Iron ores—Determination of cadmium content—Graphite furnace atomic absorption spectrophotometric method
Standard published on 30.8.2019
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GB/T 6730.79-2019
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Iron ores—Determination of cadmium content—Hydride generation-atomic fluorescence spectrometric method
Standard published on 30.8.2019
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GB/T 6730.8-2016
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Iron ores—Determination of iron(II) content—Potassium dichromate titrimetric method
Standard published on 13.10.2016
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GB/T 6730.8-2016E
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Iron ores—Determination of iron ()content—Potassium dichromate titrimetric method
Standard published on 13.10.2016
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GB/T 6730.80-2019
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Iron ores—Determination of mercury content—Cold atomic absorption spectrometric method
Standard published on 30.8.2019
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GB/T 6730.81-2020
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Iron ores—Determination of multiple trace elements—Inductively coupled plasma mass spectrometric method
Standard published on 2.6.2020
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GB/T 6730.82-2020
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Iron ores—Determination of barium content—EDTA titrimetric method
Standard published on 2.6.2020
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GB/T 6730.83-2022
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Iron ores—Determination of loss on ignition—Gravimetric method corrected by hygroscopic water
Standard published on 12.10.2022
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GB/T 6730.84-2023
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Iron ores—Determination of total rare earth content—Inductively coupled plasma atomic emission spectrometric method
Standard published on 6.8.2023
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