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# GB 5009.2-2016 PDF in English

GB 5009.2-2016 (GB5009.2-2016) PDF English
 Standard ID Contents [version] USD STEP2 [PDF] delivered in Name of Chinese Standard Status GB 5009.2-2016 English 70 Add to Cart 0-9 seconds. Auto-delivery. Determination of relative density of foods Valid GB 5009.2-2024 English 140 Add to Cart 0-9 seconds. Auto-delivery. National food safety standards--Determination of relative density of food Valid
Newer version: GB 5009.2-2024    Standards related to: GB 5009.2-2024
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## GB 5009.2-2016: PDF in English

GB 5009.2-2016 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National Food Safety Standard Determination of Relative Density of Foods ISSUED ON. AUGUST 31, 2016 IMPLEMENTED ON. MARCH 1, 2017 Issued by. National Health and Family Planning Commission of the People 's Republic of China Table of Contents Foreword ... 3  1 Scope ... 4  2 Principle... 4  3 Apparatus ... 4  4 Analysis steps ... 5  5 Expressions of analysis results ... 5  6 Precision... 6  7 Principle... 6  8 Apparatus ... 6  9 Analysis steps ... 7  10 Expressions of analysis results ... 8  11 Precision ... 8  12 Principle... 8  13 Apparatus ... 8  14 Analysis steps ... 9  15 Precision ... 9  National Food Safety Standard Determination of Relative Density of Foods 1 Scope This Standard specifies the determination method for relative density of liquid sample. This Standard is applicable to the determination for relative density of liquid sample. Method One - Density bottle method 2 Principle At 20°C, respectively determine the masses of water filled with the same density bottle and sample. The volume of density bottle, i.e., sample volume, is determined by water mass. Calculate the sample density by sample’s mass and volume. The ratio of sample density to water density is the relative density of the sample. 3 Apparatus 3.1 Density bottle. precision density bottle, as shown in Figure 1. 10 Expressions of analysis results Calculate the relative density of sample at 20°C according to equation (2). where, d - relative density of sample; P1 - reading of balance rider when floating hammer is immersed in water, in grams (g); P2 - reading of balance rider when floating hammer is immersed in sample, in grams (g). The calculated results represent the effective digits (nearest to 0.001) of the Wechsler relative density balance accuracy. 11 Precision The absolute difference between the two independent determinations obtained under reproducible conditions shall not exceed 5% of the arithmetic mean. Method Three - Proportion method 12 Principle The hydrometer uses the Archimedes principle to pour the testing liquid into a higher container. Put the hydrometer into the liquid. Hydrometer is subsided to a certain height then appears the floating state. At this time, the position of the liquid surface on the glass tube corresponding to the scale is the density of the liquid. The ratio of the measured density of the sample to the water is the relative density. 13 Apparatus Hydrometer. a scale label in the upper tube that indicates the density reading. ......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.