This standard specifies the method for determining crude fat in food by Soxhlet extraction. This standard is applicable to the determination of crude fat in meat products, bean products, nut products, fried grain products, Chinese and Western cakes and other foods. GB/T 14772-1993 Method for determination of crude fat in food GB/T14772-1993 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Method for determination of crude fat content in foods
Method for determination of crude fat content in foods1 Subject content and scope of application
This standard specifies the method for determining crude fat in foods by Soxhlet extraction. GB/T14772-93
This standard applies to the determination of crude fat in foods such as meat products, bean products, nut products, fried grain products, Chinese and Western cakes, etc. 2 Principle
After drying, the sample is extracted with anhydrous ethyl ketone or petroleum ether. After removing the ethyl ketone or petroleum ether, the residue obtained is crude fat. 3 Reagents and materials
3.1 Anhydrous ethyl ether: analytical grade, no peroxide. 3.2 Petroleum ether (HG3-1003): boiling range 30~60℃3.3 Pure sea sand: particle size 0.65~0.85mm, containing not less than 99% silicon dioxide3.4 Filter paper tube.
4 Instruments and equipmentbZxz.net
Common laboratory instruments and the following items:
4.1 Soxhlet extractor.
4.2 Electric heating blast drying oven: temperature control 103 ± 2℃. 4.3 Analytical balance: sensitivity 0.1mg.
4.4 Weighing dish: aluminum or glass, inner diameter 60~65mm, height 25~30mm. 4.5 Meat grinder: aperture not exceeding 4mm.
4.6 Tissue crusher.
5 Preparation of samples
5.1 Solid sample: Take at least 200g of representative sample, crush and grind it with a mortar, mix it evenly, and place it in a sealed glass container. Samples that are difficult to crush and grind should be cut (cut) into fine particles and placed in a sealed glass container. 5.2 Powdered samples: Take at least 200g of representative samples (if the powder particles are large, grind them with a mortar), mix them evenly, and place them in a sealed glass container.
5.3 Paste samples: Take at least 200g of representative samples, mix them evenly, and place them in a sealed glass container. 5.4 Solid and liquid samples: According to the solid-liquid ratio, take at least 200g of representative samples, crush them with a tissue grinder, mix them evenly, and place them in a sealed glass container.
5.5 Meat products: Take at least 200g of representative samples with the inedible parts removed, mince them at least twice with a meat grinder, mix them evenly, and place them in a sealed glass container.
Approved by the State Administration of Technical Supervision on December 21, 1993 and implemented on October 1, 1994
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