GB 5413.39-2010 PDF English
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GB 5413.39-2010: National food safety standard -- Determination of nonfat total milk solids in milk and milk products
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NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National Food Safety Standard - Determination of Nonfat Total Milk Solids in Milk and Milk Products Issued on. MARCH 26, 2010 Implemented on. JUNE 01, 2010 Issued by. Ministry of Health of the People’s Republic of China
Table of Contents
Foreword... 3 1 Scope... 4 2 Normative References... 4 3 Principle... 4 4 Reagents and Materials... 4 5 Instruments and Apparatuses... 5 6 Analytical Procedures... 5 7 Expression of Analytical Results... 6Foreword
This Standard replaced GB 5409-85 Test Method of Milk, and GB/T 5416-85 Analytical Method for Butter. The historical editions replaced by this Standard are as follows. --- GB/T 5049-85; --- GB/T 5416-85. National Food Safety Standard - Determination of Nonfat Total Milk Solids in Milk and Milk Products1 Scope
This Standard specifies the determination of nonfat milk solids in raw milk, pasteurized milk, sterilized milk, prepared milk and fermented milk. This Standard is applicable to the determination of nonfat milk solids in raw milk, pasteurized milk, sterilized milk, prepared milk and fermented milk.2 Normative References
The following documents are essential to the application of this Standard. For the dated documents, only the versions with the dates indicated are applicable to this Standard; for the undated documents, only the latest version (including all the amendments) are applicable to this Standard.3 Principle
Firstly, separately determine the total solid content and fat content (if adding the non- dairy ingredients such as saccharose, it shall also be deducted) in the milk and milk products.4 Reagents and Materials
Unless otherwise specified, the used reagents in this method are analytical reagents; while the used water is Class-III water specified in GB/T 6682. 4.1 Flat-bottomed box. 20mm~25mm-heigh, 50mm~70mm-diameter stainless steel or aluminum box with a stopper, or glass weighing bottle. 4.3 Quartz sand or sea-sand. it can pass through a sieve with a pore size of 500µm, cannot pass through a sieve with a pore size of 180µm; and take the following applicability test.5 Instruments and Apparatuses
5.1 Balance. sensitivity of 0.1mg. 5.3 Water bath.6 Analytical Procedures
6.1 Determination of total solids Add 20g of quartz sand or sea-sand (4.3) to the flat-bottomed box (4.1); dry it in a drying oven at 100°C±2°C for 2h; place it into the desiccator to cool off for 0.5h; weigh it; repeat the drying till it is constant weight. 6.2 Determination of fat (as per the method specified in GB 5413.3). 6.3 Determination of saccharose (as per the method specified in GB 5413.5).7 Expression of Analytical Results
......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.