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GB 29202-2012 English PDF
GB 29202-2012_English: PDF (GB29202-2012)
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GB 29202-2012
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Food Additives -- Nitrogen [including 2016 Modification 1]
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GB 29202-2012
BASIC DATA
Standard ID
GB 29202-2012 (GB29202-2012)
Description (Translated English)
Food Additives -- Nitrogen [including 2016 Modification 1]
Sector / Industry
National Standard
Classification of Chinese Standard
X40
Classification of International Standard
67.220.20
Word Count Estimation
7,775
Regulation (derived from)
Ministry of Health Bulletin 2012 No. 23
Issuing agency(ies)
Ministry of Health of the People's Republic of China
Summary
This Chinese standard applies to cryogenic air separation nitrogen, pressure swing adsorption and membrane separation nitrogen and nitrogen small dedicated Nitrogen production of food additives nitrogen.
GB 29202-2012 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National Food Safety Standard – Food Additives – Nitrogen 食品添加剂 氮气 ISSUED ON: DECEMBER 25, 2012 IMPLEMENTED ON: JANUARY 25, 2013 Issued by: National Health and Family Planning Commission of the People’s Republic of China Table of Contents 1 Application Scope ... 3 2 Molecular Formula and Relative Molecular Mass ... 3 3 Technical Requirements ... 3 Annex A Test Method ... 5 No.1 Amendment ... 7 National Food Safety Standard – Food Additives – Nitrogen 1 Application Scope This Standard applies to food additive nitrogen produced by deep cooling air separation, pressure swing absorption, membrane separation and small special nitrogen making machine. 2 Molecular Formula and Relative Molecular Mass 2.1 Molecular formula N2 2.2 Relative molecular mass 28.01 (in accordance with International Relative Atomic Masses 2007) 3 Technical Requirements 3.1 Sensory requirements As specified in Table 1. Table 1 – Sensory Requirements 3.2 Physiochemical indexes As specified in Table 2. Annex A Test Method A.1 Warning A high-pressure gas cylinder is used in the test method of this Standard, so appropriate safety and protection measures shall be taken. A.2 Identification test Insert a small wood stick ignited carefully into a test tube filled with test gas; the flame extinguishes. A.3 Determination of nitrogen (N2) content The volume fraction of nitrogen (N2) content φ is calculated in accordance with the following equation: where φ1 – volume fraction of oxygen determined in A.4. A.4 Determination of oxygen (O2) A.4.1 Electrochemical process A.4.1.1 Method summary Place samples in an appropriate form into an electrochemical reactor; measure and calculate oxygen content through direct determination method or comparative measurement method. A.4.1.2 Apparatus Trace oxygen analyzer: as specified in GB/T 6285. A.4.1.3 Analysis procedure Measurement shall be as specified in GB/T 6285; specific operation shall be as specified in the specifications of apparatus. A.4.2 Zirconia detector gas chromatographic method A.4.2.1 Method summary
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