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Standards GB - Chinese national standards - Page 5225

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 7737-2007

Ferroniobium

Standard published on 11.9.2007

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GB/T 7738-2008

Notations for designation of ferroallys

Standard published on 5.8.2008

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GB/T 7739.1-2019

Methods for chemical analysis of gold concerntrates—Part 1Determination of gold and silver contents

Standard published on 31.12.2019

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GB/T 7739.10-2025

Methods for chemical analysis of gold concentrates—Part 10: Determination of antimony content

Standard published on 30.6.2025

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GB/T 7739.12-2016

Methods for chemical analysis ofgoldconcentrates—Part 12: Determination of arsenic, mercury, cadmium, lead, bismuth—Atomic fluorescence spectrometric method

Standard published on 29.8.2016

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GB/T 7739.13-2019

Methods for chemical analysis of gold concentrates—Part 13: Determination of lead zinc bismuth cadmium chromium arsenic and mercury contents—Inductively coupled plasma atomic emission spectrometry

Standard published on 4.6.2019

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GB/T 7739.14-2019

Methods for chemical analysis of gold concentrates—Part 14: Determination of thallium content—Inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry

Standard published on 30.8.2019

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GB/T 7739.15-2025

Methods for chemical analysis of gold concentrates—Part 15Determination of platinum group elements contents

Standard published on 31.10.2025

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