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GB 29202-2012 PDF in English


GB 29202-2012 (GB29202-2012) PDF English
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GB 29202-2012English90 Add to Cart 0-9 seconds. Auto-delivery. Food Additives -- Nitrogen [including 2016 Modification 1] Valid
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GB 29202-2012: PDF in English

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 ......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.