Standard No.:	GB/T 6433-2006
English Name:	Determinaiion of crude fat in feeds
Chinese Name:	饲料中粗脂肪的测定
Chinese Classification:	B46    Livestock and poultry feed and additive
Professional Classification:	GB    National Standard
Issued by:	AQSIQ; SAC
Issued on:	2006-6-9
Implemented on:	2006-9-1
Status:	valid
Superseding:	GB/T 6433-1994 Method for the determination of crude fat in feedstuffs
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	60.0
Delivery:	via email in 1 business day

This standard specifies a method for the determination of the fat content of animal feeds. The method is applicable to animal feeds except oilseeds and oilseed residues. For the purposes of this method, the following two categories of animal feeds are classified into the following two categories. Samples of products in category B need a hydrolysis step prior to extraction. Category B: - Straight feeds of animal origin including milk products; - Straight feeds of vegetable origin from which fats cannot be extracted without prior hydrolysis; in particular: gluten, yeast, soya and potato proteins, and heat-treated feeds; - Compound feeds containing the preceding products in such quantities that at least 20% of the fat content stems from these products. Category A: animal feeds not mentioned under category B. For oilseed, a method for the determination of the "oil content" by hexane extraction is specified in ISO 659[1], Note: For oilseed residues, a method for the determination of the "oil content" by hexane extraction is specified in ISO 734-1[2], whereas a method for the determination of the "oil content" by diethyl ether extraction is specified in ISO 736[3].

Foreword II 1 Scope 2 Normative References 3 Terminologies and Definitions 4 Principles 5 Reagents and Materials 6 Apparatus 7 Sampling 8 Preparation of Test Sample 9 Procedure 10 Calculation 11 Precision 12 Test report Appendix A (Informative) Results of Interlaboratory Tests References