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Standards GB - Chinese national standards - Page 5133
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 7467-1987
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Water quality--Determination of chromium()--15 Diphenylcarbohydrazide spectrophotometric method
Standard published on 6.3.1987
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GB/T 7469-1987
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Water quality--Determination of the total mercury--Potassium permanganate-pootassium peralfate descomposed method--Dithizone spectrophotometric method
Standard published on 6.3.1987
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GB/T 747-2003
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Pulps--Determination of acid-insoluble lignin
Standard published on 25.8.2003
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GB/T 7470-1987
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Water quality--Determination of lead--Spectrophotometric method with dithizone
Standard published on 6.3.1987
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GB/T 7471-1987
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Water quality--Determination of cadmium--Spectrophotometric method with dithizone
Standard published on 6.3.1987
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GB/T 7472-1987
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Water quality--Determination of zinc--Spectrophotometric method with dithizone
Standard published on 6.3.1987
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GB/T 7475-1987
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Water quality--Determination of copper zinc lead and cadmium--Atomic absorption spectrometry
Standard published on 6.3.1987
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GB/T 7476-1987
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Water quality--Determination of calcium--EDTA titrimetric method
Standard published on 6.3.1987
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GB/T 7477-1987
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Water quality--Determination of thesum of calcium and magnesium--EDTA titrimetric method
Standard published on 6.3.1987
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GB/T 748-2023
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Sulfate resistance portland cement
Standard published on 23.5.2023
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