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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
Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 1: Determination of cerium oxide content - Ammonium ferrous sulfate titrimetry
Standard published on 30.10.2009
Selected format:Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 10: Determination of manganese oxide content - Flame atomic absorption spectrometry
Standard published on 30.10.2009
Selected format:Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 11: Determination of lead oxide content - Flame atomic absorption spectrometry
Standard published on 30.10.2009
Selected format:Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 12: Determination of sulfate radical
Standard published on 30.10.2009
Selected format:Chemical analysis methods for rare earth chloride and light rare erath carbonate--Part 13: Determination of ammonium chloride content
Standard published on 14.10.2017
Selected format:Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 14: Determination of phosphorus radical content - Phosphorus-antimonate-molybdenum blue spectrophotometry
Standard published on 30.10.2009
Selected format:Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 15: Determination of chlorine content in light rare earth carbonate - Silver nitrate turbidimetry
Standard published on 30.10.2009
Selected format:Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 16: Determination of water insoluble substance content in rare earth chloride - Gravimetry
Standard published on 30.10.2009
Selected format:Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 18: Determination of ignition loss content in light rare earth carbonate - Gravimetry
Standard published on 30.10.2009
Selected format:Chemical analysis methods of rare earth chloride and light rare earth carbonate - Part 2: Determination of europium oxide content - Inductively coupled plasma mass spectrometry
Standard published on 30.10.2009
Selected format:Latest update: 2026-06-12 (Number of items: 2 281 969)
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