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GB/T 21704-2008 English PDF

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US$149.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21704-2008: Determination of non-protein-nitrogen content in milk and dairy products
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21704-2008	149	Add to Cart	2 days	Determination of non-protein-nitrogen content in milk and dairy products	Valid

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Basic data

Standard ID: GB/T 21704-2008 (GB/T21704-2008)
Description (Translated English): Determination of non-protein-nitrogen content in milk and dairy products
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: C53
Classification of International Standard: 67.100.01
Word Count Estimation: 5,530
Date of Issue: 2008-04-09
Date of Implementation: 2008-07-01
Quoted Standard: GB/T 5009.1-2003; GB/T 5009.5-2003; GB/T 6682
Adopted Standard: ISO 8968-4-2001/IDF 20-4-2001, MOD
Regulation (derived from): National Standard Approval Announcement 2008 No.6 (Total No.119)
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 determination of non-protein nitrogen in milk and dairy content. This standard applies to the determination of milk and dairy products non-protein nitrogen content. The detection limit was 3. 5X10-4g/100g.

GB/T 21704-2008: Determination of non-protein-nitrogen content in milk and dairy products

---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 non-protein-nitrogen content in milk and dairy products ICS 67.100.01 C53 National Standards of People's Republic of China Determination of milk and milk nonprotein nitrogen content (ISO 8968-4.2001/IDF20-4.2001, Milk-Determinationofnitrogencontent- Part 4. Determinationofnon-protein-nitrogencontent, MOD) Posted 2008-04-09 2008-07-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts ISO 8968-4.2001/IDF20-4.2001 "Detection milk nitrogen content - Part 4. Detection of non-protein nitrogen Content "(in English). This standard is based on ISO 8968-4.2001/IDF20-4.2001 redrafted, according to GB/T 20001.4-2001 "drafting standards Rule 4. Chemical analysis methods, "the original standard configuration has been modified. The standard proposed by the People's Republic of China Ministry of Agriculture. This standard by the National Standardization Technical Committee of animal husbandry. This standard was drafted. the Ministry of Agriculture Food Quality Supervision and Testing Center (Shanghai). The main drafters of this standard. Meng Jin, Zheng tree crown, Han Yi Yi, Wu Rong, Zhu Jianxin. Determination of milk and milk nonprotein nitrogen content

1 Scope

This standard specifies the method for determination of milk and milk products nonprotein nitrogen content. This standard applies to the determination of milk and milk products nonprotein nitrogen content. The detection limit is 3.5 × 10-4g/100g.

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 5009.1-2003 food hygiene inspection method Physical and chemical section General Determination of GB/T 5009.5-2003 protein in food GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987)

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Protein content other than nitrogen. Principle 4 After using 15% trichloroacetic acid solution was precipitated proteins, the filtrate was digested, distillation, with 0.01mol/L of hydrochloric acid titration, the nitrogen content calculated, Central Africa is the content of the sample protein nitrogen.

5 Reagents and materials

Unless otherwise specified, use only analytical reagent. 5.1 Water. GB/T 6682 provided a water. 5.2 Sucrose (C12H22O11). mass fraction of nitrogen content is not more than 0.002%, can not be dried in an oven prior to use. 5.3 TCA solution. 150g/L, weighed 15.0g TCA (CCl3COOH), dissolved in water and diluted to 100mL, and mix. 5.4 hydrochloric acid standard titration solution [Ba (HCl) = 0.01mol/L]. the preparation of calibration according to GB/T 5009.1-2003 Appendix B to perform. 5.5 Other reagents with GB/T 5009.5-2003 reagents. 5.6 Quantitative filter paper. speed.

6 Equipment

Common laboratory equipment and the following. 6.1 Analysis of balance. a sense of the amount of 0.0001g. 6.2 homogenizer. Speed \u200b\u200b6000r/min ~ 18000r/min. 6.3 Nitrogen distillation apparatus, or azotometer. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21704-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21704-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 21704-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21704-2008_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.