GB/T 6433-2006 English PDF (GB/T6433-2006)

GB/T 6433-2006: Determination of crude fat in feeds
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NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.120 B 46
GB/T 6433-2006 / ISO 6492.1999
Replacing GB/T 6433-1994
Determination of crude fat in feeds
(ISO 6492.1999, IDT)
Issued on. June 09, 2006 Implemented on. September 01, 2006
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China.
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Term and definition ... 5
4 Principle ... 5
5 Reagents and materials ... 5
6 Apparatus ... 6
7 Sampling ... 6
8 Preparation of test sample ... 7
9 Analysis procedure ... 7
10 Calculation ... 9
11 Precision ... 10
12 Test report ... 11
Annex A (informative) Results of interlaboratory tests ... 12
Bibliography ... 14
This Standard is the revised version of GB/T 6433-1994 “Method for determination of crude fat in feeds”.
The main difference between this Standard and the 1994 edition is the addition of hydrolysis method.
This Standard is identical to the International Standard ISO 6492.1999 “Animal feeding stuffs - Determination of fat content”.
This Standard has made the following editorial modifications.
- The word “this International Standard" is modified to the word “this Standard”;
-REPLACE the comma “,” used as the decimal point WITH the decimal point “.”;
- DELETE the foreword of the International Standard;
-REPLACE ISO 3696 with GB/T 6682; REPLACE ISO 6497 with GB/T 14699.1; REPLACE ISO 6498 with GB/T 20195; REPLACE ISO 57251.1994 with GB/T 6379.1-2004; REPLACE ISO 5725-2.1994 with GB/T 6379.2-2004.
This Standard replaces GB/T 6433-1994 from the date of implementation.
Annex A of this Standard is an informative annex.
This Standard was proposed by and shall be under the jurisdiction of National Technical Committee on Feed Industry of Standardization Administration of China.
Drafting organization of this Standard. National Feed Quality Supervision and Inspection Center (Beijing).
Main drafters of this Standard. Zhang Su, Li Lizhen, Fan Zhiying, Yang Shuming, Su Xiaoou.
The previous released versions replaced by this Standard are as follows.
- GB/T 6433-1994, GB/T 6433-1986.
1 Scope
This Standard specifies a method for the determination of the fat content of animal feeding stuffs. The method is applicable to animal feeding stuffs except oilseeds and oilseed residues.
For the purposes of this method, the following two categories of animal feeding stuffs are distinguished. 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 feeding stuffs not mentioned under category B.
For oilseeds, 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].
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
[1] ISO 659, Oilseeds - Determination of oil content (Reference method).
[2] ISO 734-1, Oilseed residues - Determination of oil content - Part 1. Extraction method with hexane (or light petroleum).
[3] ISO 736, Oilseed residues - Determination of diethyl ether extract.
[4] GB/T 14699.1 Animal feeding stuffs - Sampling.
[5] ISO 5725.1986, Precision of test methods - Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests.
[6] GB/T 6379.1-2004 Accuracy (trueness and precision) of measurement methods and results - Part 1. General principles and definitions.
[7] GB/T 6379.2-2004 Accuracy (trueness and precision) of measurement methods and results - Part 2. Basic method for the determination of repeatability and reproducibility of a standard measurement method.
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.120 B 46
GB/T 6433-2006 / ISO 6492.1999
Replacing GB/T 6433-1994
Determination of crude fat in feeds
(ISO 6492.1999, IDT)
Issued on. June 09, 2006 Implemented on. September 01, 2006
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China.
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Term and definition ... 5
4 Principle ... 5
5 Reagents and materials ... 5
6 Apparatus ... 6
7 Sampling ... 6
8 Preparation of test sample ... 7
9 Analysis procedure ... 7
10 Calculation ... 9
11 Precision ... 10
12 Test report ... 11
Annex A (informative) Results of interlaboratory tests ... 12
Bibliography ... 14
This Standard is the revised version of GB/T 6433-1994 “Method for determination of crude fat in feeds”.
The main difference between this Standard and the 1994 edition is the addition of hydrolysis method.
This Standard is identical to the International Standard ISO 6492.1999 “Animal feeding stuffs - Determination of fat content”.
This Standard has made the following editorial modifications.
- The word “this International Standard" is modified to the word “this Standard”;
-REPLACE the comma “,” used as the decimal point WITH the decimal point “.”;
- DELETE the foreword of the International Standard;
-REPLACE ISO 3696 with GB/T 6682; REPLACE ISO 6497 with GB/T 14699.1; REPLACE ISO 6498 with GB/T 20195; REPLACE ISO 57251.1994 with GB/T 6379.1-2004; REPLACE ISO 5725-2.1994 with GB/T 6379.2-2004.
This Standard replaces GB/T 6433-1994 from the date of implementation.
Annex A of this Standard is an informative annex.
This Standard was proposed by and shall be under the jurisdiction of National Technical Committee on Feed Industry of Standardization Administration of China.
Drafting organization of this Standard. National Feed Quality Supervision and Inspection Center (Beijing).
Main drafters of this Standard. Zhang Su, Li Lizhen, Fan Zhiying, Yang Shuming, Su Xiaoou.
The previous released versions replaced by this Standard are as follows.
- GB/T 6433-1994, GB/T 6433-1986.
1 Scope
This Standard specifies a method for the determination of the fat content of animal feeding stuffs. The method is applicable to animal feeding stuffs except oilseeds and oilseed residues.
For the purposes of this method, the following two categories of animal feeding stuffs are distinguished. 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 feeding stuffs not mentioned under category B.
For oilseeds, 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].
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
[1] ISO 659, Oilseeds - Determination of oil content (Reference method).
[2] ISO 734-1, Oilseed residues - Determination of oil content - Part 1. Extraction method with hexane (or light petroleum).
[3] ISO 736, Oilseed residues - Determination of diethyl ether extract.
[4] GB/T 14699.1 Animal feeding stuffs - Sampling.
[5] ISO 5725.1986, Precision of test methods - Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests.
[6] GB/T 6379.1-2004 Accuracy (trueness and precision) of measurement methods and results - Part 1. General principles and definitions.
[7] GB/T 6379.2-2004 Accuracy (trueness and precision) of measurement methods and results - Part 2. Basic method for the determination of repeatability and reproducibility of a standard measurement method.