GB/T 24318-2009 English PDF

US$399.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 24318-2009: Determination of total nitrogen content in animal feeding stuffs by combustion according to the Dumas principle and calculation of the crude protein content
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 24318-2009	399	Add to Cart	3 days	Determination of total nitrogen content in animal feeding stuffs by combustion according to the Dumas principle and calculation of the crude protein content	Valid

Similar standards

GB/T 23879   GB/T 23742   GB/T 23882   GB/T 17818   GB/T 45200   GB/T 17812   

Basic data

Standard ID: GB/T 24318-2009 (GB/T24318-2009)
Description (Translated English): Determination of total nitrogen content in animal feeding stuffs by combustion according to the Dumas principle and calculation of the crude protein content
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B46
Classification of International Standard: 65.120
Word Count Estimation: 17,155
Date of Issue: 2009-09-30
Date of Implementation: 2009-12-01
Quoted Standard: GB/T 14699.1
Adopted Standard: ISO/FDIS 16634-2005 (E), MOD
Regulation (derived from): National Standard Approval Announcement 2009 No.10 (Total No.150)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the total nitrogen content of feedstuffs determined Dumas combustion method. This standard applies to the determination of crude protein and total nitrogen content of feedstuffs single calculation, detection method for confining 0. 1 mg.

GB/T 24318-2009: Determination of total nitrogen content in animal feeding stuffs by combustion according to the Dumas principle and calculation of the crude protein content

---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.
Determination of total nitrogen content in animal feeding stuffs by combustion according to the Dumas principle and calculation of the crude protein content ICS 65.120 B46 National Standards of People's Republic of China Determination of the total nitrogen content of the feed ingredients Dumas combustion method And calculation of crude protein Posted 2009-09-30 2009-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 3.1 total nitrogen content 1 The crude protein content of 3.2 1 4 Principle 1 5 Reagent 1 5.1 1 carrier gas 5.2 Combustion gas 1 5.3 oxidizer 1 5.4 reductant 1 5.5 Adsorbent 1 5.6 standard 2 2 6 Instrument 6.1 Analytical Balance 2 6.2 Sample grinder or mortar 2 6.3 Sample screen 2 6.4 square piece of tin foil, a nitrogen-free paper or tin capsules 2 Dumas 6.5 azotometer 2 6.6 power supply 2 7 Sampling and Sample Preparation 2 7.1 Sample 2 7.2 Sample Preparation 2 Step 2 8 Analysis 8.1 Calibration 2 8.2 Test Sample 2 8.3 Determination of 2 9 3 Calculation Results 9.1 3 total nitrogen content The total nitrogen content 9.1.1 direct injection analysis of samples 3 9.1.2 Analysis of concentration and drying process after total nitrogen content of the sample 3 The crude protein content of 9.2 3 9.3 The results are shown 3 3 10 Repeatability 11 Reproducibility 3 Appendix A (informative) This standard reg number and ISO /FDIS16634.2005 (E) 4 control reg number Annex B (informative) This standard and ISO /FDIS16634.2005 (E) Technical Difference and Cause 5 Annex C (informative) Basic Instrumentation Dumas Scheme 6 Annex D (informative) protein Factor 7 Annex E (informative) repeatability limit and reproducibility limit 8 Annex F (informative) standard curve 11

Foreword

This revised standard adopts the International Standard ISO /FDIS16634.2005 (E) "Cereals, pulses, miledcerealproducts, oil- seedsandanimalfeedingstuffs-Determinationofthetotalnitrogencontentbycombustionaccording totheDumasprincipleandcalculationofthecrudeproteincontent "(in English). This standard is based on ISO /FDIS16634.2005 (E) drafted. This chapter lists the standard article numbering in Appendix A and ISO / FDIS16634.2005 (E) to modify the number of reg control list section. Taking into account China's national conditions, in the use of ISO /FDIS16634. When 2005 (E), this standard made some changes. About the technical difference is Incorporated into the text and a single vertical line identifies them involved with the provisions margin. In Appendix B gives these technical difference Its list of different reasons for reference. For ease of use, this standard according to GB/T 1.1 requirements for standard content made following editorial and structural modifications. --- "This International Standard" be replaced by "this standard"; --- Replace the original decimal by decimal points ",". ","; --- Replace the original text with Chinese punctuation. "". ""; --- The International Standard foreword replace our standard preface. The Standard Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, Appendix F are informative appendices. This standard by the National Standardization Technical Committee Feed Industry and focal points. This standard was drafted. China Agricultural University College of Animal Science and Technology, Beijing Branch of China Star Electronics Co., Ltd. The main drafters of this standard. Meng Qingxiang, Ren Liping, Guo Wang Shan, Ding, Dai Hui, Yang Yun, Zhouzhen Ming, Guo Kaijun. Determination of the total nitrogen content of the feed ingredients Dumas combustion method And calculation of crude protein

1 Scope

This standard specifies the total nitrogen content of the feed ingredients Dumas combustion method for the determination. This standard applies to the determination of crude protein content and total nitrogen content of the feed ingredients single calculation, the detection limit was 0.1mg.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 14699.1 feed sampling (GB/T 14699.1-2005, ISO 6497.2002, IDT)

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Sample mass percentage of nitrogen. 3.2 The total nitrogen content multiplied by a conversion factor (see Appendix D), expressed as a percentage by mass. Principle 4 Under aerobic conditions, the sample combustion tube combustion heating (about 900 ℃), the interference component is generated to a range of appropriate absorbent In addition, the nitrogen-containing substance in the sample is quantitatively converted into molecular nitrogen after a thermal conductivity detector.

5 Reagents

The reagents used in this standard, unless otherwise specified, were of analytical grade. Different analytical instruments used in different reagents. 5.1 The carrier gas Helium (99.99%) or carbon dioxide (99.99%). 5.2 Combustion gas Oxygen (99.99%). 5.3 oxidants Selecting (copper oxide, aluminum oxide, magnesium) according to the type of instrument. 5.4 reductant Choose (copper, tungsten) according to the type of instrument. 5.5 Adsorbent Choose (phosphorus pentoxide, magnesium perchlorate, solid, solid sodium carbonate) according to the type of instrument. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 24318-2009_English be delivered?

Answer: Upon your order, we will start to translate GB/T 24318-2009_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 24318-2009_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 24318-2009_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.