GB/T 20806-2022 English PDF

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GB/T 20806-2022: Determination of neutral detergent fiber(NDF) in feeds
Status: Valid

GB/T 20806: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20806-2022	279	Add to Cart	3 days	Determination of neutral detergent fiber(NDF) in feeds	Valid
GB/T 20806-2006	279	Add to Cart	3 days	Determination of neutral detergent fiber in feedstuffs	Obsolete

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Basic data

Standard ID: GB/T 20806-2022 (GB/T20806-2022)
Description (Translated English): Determination of neutral detergent fiber(NDF) in feeds
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B46
Classification of International Standard: 65.120
Word Count Estimation: 14,114
Date of Issue: 2022-12-30
Date of Implementation: 2023-07-01
Older Standard (superseded by this standard): GB/T 20806-2006
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 20806-2022: Determination of neutral detergent fiber(NDF) in feeds

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 65.120 CCSB46 National Standards of People's Republic of China Replacing GB/T 20806-2006 Determination of Neutral Detergent Fiber (NDF) in Feed Posted on 2022-12-30 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document replaces GB/T 20806-2006 "Determination of Neutral Detergent Fiber (NDF) in Feed", and is consistent with GB/T 20806-2006 In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Change the sample fineness requirements (see 4.4, 7.2 of the.2006 edition); b) Added a pre-degreasing step (see 4.5.3); c) Added "0.5g anhydrous sodium sulfite" for digestion (see 4.5.4); d) Increased filter aid (see 4.5.5); e) Changed the test data processing (see 4.6, 8.1 of the.2006 edition); f) The filter bag method is added (see Chapter 5); g) Increased calibration and dilution of thermostable α-amylase (see Appendix A). Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Feed Industry Standardization Technical Committee (SAC/TC76). This document is drafted by. Sichuan Well Testing Technology Co., Ltd., Shandong Provincial Livestock Product Quality and Safety Center, Qinghai Provincial Agricultural village hall. The main drafters of this document. Zhang Fengping, Zhang Yun, Zhang Ru, Song Jun, Sun Yanjun, Du Yaxin, Song Tao, Zhang Wei, Li Bin, Li Yongliang, Zhang Xiaochao. The release status of previous versions of this document and the documents it replaces are as follows. ---It was first published as GB/T 20806-2006 in.2006; --- This is the first revision. Determination of Neutral Detergent Fiber (NDF) in Feed

1 Scope

This document describes the crucible and filter bag methods for the determination of neutral detergent fiber (NDF) in feed. This document is applicable to the determination of neutral detergent fiber (NDF) in compound feed, concentrated feed, concentrate supplement and feed raw materials.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 6682 Analytical laboratory water specifications and test methods GB/T 20195 Preparation of Animal Feed Samples

3 Terms and Definitions

This document does not have terms and definitions that need to be defined. 4 Crucible method (arbitration method) 4.1 Principle Digest and wash with thermostable α-amylase and neutral washing solution to remove easily digestible protein, lipid, sugar, starch and fruit in the sample. After gluing, what remains is insoluble fiber residues, mainly vegetable raw material components such as cellulose, hemicellulose and lignin, and animal products. Indigestible nitrogenous substances. 4.2 Reagents or materials Unless otherwise specified, use only analytical grade reagents. 4.2.1 Water. GB/T 6682, Class III. 4.2.2 Anhydrous sodium sulfite (Na2SO3). 4.2.3 Acetone. 4.2.4 Hydrochloric acid solution (4mol/L). Measure 328mL of concentrated hydrochloric acid, dilute with water to 1000mL, and mix well. 4.2.5 Thermostable α-amylase solution. purchase thermostable α-amylase. Calibrate and test thermostable α-amylase according to Appendix A before use Dilute to ensure that the diluted 2mL thermostable α-amylase solution can remove the starch in 0.5g raw corn flour. Diluted heat stable α- The amylase solution is stored at 2°C~8°C, and the validity period is 5 days. 4.2.6 Neutral washing solution. Measure 500mL of water into a 1000mL beaker, add 18.6g of disodium edetate (C10H14 N2O8Na2 2H2O), 4.56g anhydrous disodium hydrogen phosphate (Na2HPO4) and 6.81g sodium tetraborate (Na2B4O7 10H2O), heating Dissolve, mix well, and place in a fume hood. Add 30g sodium dodecyl sulfate (C12H25NaO4S), dissolve and add 10mL triethylene diethylene disulfide Alcohol (C6H14O4) to eliminate foam, add water to about 950mL, stir evenly, use concentrated hydrochloric acid or sodium hydroxide to adjust the pH to 6.95~7.05, water Dilute to 1000mL. Store at room temperature. ......

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