GB 5413.33-2010National food safety standard -- Determination of specific gravity in raw milk (English PDF)
生乳相对密度的测定
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Issued by
Ministry of Health of the People’s Republic of China
Level / Type
National · Mandatory
Issue date
March 26, 2010
Implementation date
June 1, 2010
Scope
GB 5413.33-2010 is the English-translated version of 生乳相对密度的测定.
GB 5413.33-2010 is the Chinese standard "National food safety standard -- Determination of specific gravity in raw milk". Its scope clause reads: This Standard specifies the determination of specific gravity of raw milk.
This Standard is applicable to the determination of specific gravity of raw milk. Its clauses include principle; apparatus; analytical procedures. It was issued by the Ministry of Health of the People’s Republic of China on 2010-03-26 and took effect on 2010-06-01.
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Document preview — GB 5413.33-2010
National Standard of the People's Republic of China
Issued by: Ministry of Health of the People’s Republic of China
Contents
- Foreword...3
- 1 Scope...4
- 2 Principle...4
- 3 Apparatus...4
- 4 Analytical Procedures...4
- 5 Expression of Analytical Results...5
1 Scope
This Standard specifies the determination of specific gravity of raw milk.
This Standard is applicable to the determination of specific gravity of raw milk.
2 Principle
Test the sample by a densitometer; specific gravity can be obtained by checking the table according to the readings.
3 Apparatus
3.1 Densitometer: 20°C/4°C.
3.2 Glass cylinder or 200mL~250mL measuring cylinder: the height of the cylinder shall be greater than the length of the densitometer; its diameter shall be such that the distance between the periphery of the cylinder and the inner wall of it is no less than
5mm when it is sunk into the densitometer.
4 Analytical Procedures
Mix and adjust the sample at a temperature of 10°C~25°C; carefully pour into the glass cylinder; do not make foam and measure the temperature of sample. Carefully place the densitometer into the sample to a considerable scale of 30°; then let is float naturally, but not in contact with the inner wall of the measuring cylinder. Stand for
2min~3min; the eyes horizontally look at the height of the surface of the raw milk; read the value. According to sample temperature and the densitometer readings, check the
Table 1; then convert into the degrees at 20°C.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 5 pages — is available in the English PDF.
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