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GB/T 17811-2025 English PDF

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US$219.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 17811-2025: Determination of pepsin digestibility for animal-derived protein feeds - Filtration method
Status: Valid

GB/T 17811: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 17811-2025	219	Add to Cart	3 days	Determination of pepsin digestibility for animal-derived protein feeds - Filtration method	Valid
GB/T 17811-2008	110	Add to Cart	Auto, < 3 mins	Determination of pepsin digestibility in animal protein feeds -- Filtration method	Valid
GB/T 17811-1999	239	Add to Cart	2 days	Determination of digestibility in animal protein feeds--Pepsin method	Obsolete

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Basic data

Standard ID: GB/T 17811-2025 (GB/T17811-2025)
Description (Translated English): Determination of pepsin digestibility for animal-derived protein feeds - Filtration method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B46
Classification of International Standard: 65.120
Word Count Estimation: 10,164
Date of Issue: 2025-08-01
Date of Implementation: 2026-02-01
Older Standard (superseded by this standard): GB/T 17811-2008
Issuing agency(ies): State Administration for Market Regulation, Standardization Administration of China

GB/T 17811-2025: Determination of pepsin digestibility for animal-derived protein feeds - Filtration method

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT17811-2025
ICS 65.120 CCSB46 National Standard of the People's Republic of China Replaces GB/T 17811-2008 Animal-derived protein feed pepsin Determination of digestibility by filtration method Filtration method Released on August 1, 2025 Implementation on February 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface

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 17811-2008 "Animal protein feeds - Determination of pepsin digestibility - Filtration method" Compared with GB/T 17811-2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Added a chapter on “Terms and Definitions” (see Chapter 3); b) Added the CAS number and source of pepsin (see 5.4); c) The degreasing reagents have been changed (see 8.1, 7.1 of the.2008 edition); d) The degreasing requirements have been changed (see 8.1, 7.1 of the.2008 edition); e) The reagents for digestion residue treatment have been changed (see 8.3, 7.3 of the.2008 edition); f) Added the calculation formula for the determination of undigested crude protein content (see Chapter 9); g) The precision requirements have been changed (see Chapter 10, Chapter 8 of the.2008 edition); h) Added the method for determining pepsin activity (see Appendix A). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Feed Industry Standardization Technical Committee (SAC/TC76). This document was drafted by. Shandong New Hope Liuhe Group Co., Ltd., Tongwei Agricultural Development Co., Ltd., and Guoliang Wuhan Scientific Research and Design Co., Ltd. Institute Co., Ltd., New Hope Liuhe Co., Ltd. The main drafters of this document are. Yang Qing, Xie Gengnan, Zhang Fengping, Liu Xiaomin, Wang Lin, Luo Fuxing, Han Xiaohui, Wang Boyuan, Dong Xiuhong, Yu Aibing, Guo Tuanjie, Yu Ping, Xu Shaohua, Li Xiaobo, Zhang Lu, Yang Fashu, and Du Yan. The previous versions of this document and the documents it replaces are as follows. --- First published as GB/T 17811-1999 in.1999 and first revised in.2008; ---This is the second revision. Animal-derived protein feed pepsin Determination of digestibility by filtration method

1 Scope

This document describes a method for determining the pepsin digestibility of protein feedstuffs of animal origin. This document applies to the determination of pepsin digestibility of animal-derived protein feeds.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 6432 Determination of crude protein in feeds - Kjeldahl method GB/T 6433 Determination of crude fat in feeds GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 20195 Preparation of animal feed samples

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 At 45℃ and pH 1-2, animal-derived protein feed was digested with 20U/mL pepsin solution for 16h, and the digested crude protein The ratio of protein to crude protein. Note. There is no direct correlation between pepsin digestibility and in vivo digestibility of animal-derived protein feeds.

4 Principles

The sample was digested with pepsin under specified conditions, the insoluble residue was separated, and the undigested crude protein content in the residue and the crude protein content of the sample were determined. Protein content was calculated and pepsin digestibility was obtained.

5 Reagents or materials

Unless otherwise specified, only analytical grade reagents were used. 5.1 Water. GB/T 6682, Grade 3. 5.2 Petroleum ether. boiling range 30℃~60℃. 5.3 Anhydrous ethanol. 5.4 Pepsin. Derived from porcine stomach, CAS No. 9001-75-6.Enzyme activity is determined according to Appendix A. 5.5 Hydrochloric acid solution. Pipette 6.1 mL of hydrochloric acid, dilute to 1000 mL (pH 1-2) with water, and mix thoroughly. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 17811-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 17811-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 17811-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 17811-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 17811-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 17811-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.