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GB/T 42955-2023 English PDF

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US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42955-2023: Determination of total nitrogen content for fertilizers - Dumas combustion method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42955-2023	189	Add to Cart	3 days	Determination of total nitrogen content for fertilizers - Dumas combustion method	Valid

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Basic data

Standard ID: GB/T 42955-2023 (GB/T42955-2023)
Description (Translated English): Determination of total nitrogen content for fertilizers - Dumas combustion method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G20
Classification of International Standard: 65.080
Word Count Estimation: 10,130
Date of Issue: 2023-08-06
Date of Implementation: 2024-03-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42955-2023: Determination of total nitrogen content for fertilizers - Dumas combustion method

---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 65.080 CCSG20 National Standards of People's Republic of China Determination of total nitrogen content in fertilizers Dumas combustion method Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Standardization Technical Committee on Fertilizers and Soil Conditioners (SAC/TC105). This document was drafted by. Sichuan Chemical Quality and Safety Inspection Institute, Shanghai Institute of Chemical Industry Testing Co., Ltd., Shenzhen Batian Ecological Industry Cheng Co., Ltd., Shandong Product Quality Inspection Research Institute, Chongqing Jianfeng Chemical Co., Ltd. The main drafters of this document. Wang Xiaoyun, Yu Xiuhua, Tan Zhan'ao, Wang Ting, Wang Weiling, Hua Jianqing, Yu Xiaofei, Li Zhe, Wu Jiacheng, Zhang Juan, Wu Yandong, Li Zhao, Zhang Rong, Ying Xianqiang. Determination of total nitrogen content in fertilizers Dumas combustion method

1 Scope

This document describes the Dumas combustion method for the determination of total nitrogen content in fertilizers. This document applies to the determination of total nitrogen content in fertilizers. This document does not apply to the determination of total nitrogen in ammonium bicarbonate. Note. When the sample amount is 100 mg, the detection limit of this document is 0.02%.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 8170 Numerical rounding rules and representation and determination of limit values NY/T 887 Determination of density of liquid fertilizer

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Principles

In an oxygen-rich environment, after the sample is heated and burned in the combustion tube, the nitrogen-containing substances are converted into NOx, and the resulting interference components are absorbed The NOx is removed by the reducing agent, and NOx is quantitatively converted into molecular nitrogen under the action of the reducing agent. After being detected by the thermal conductivity detector, the total nitrogen content of the sample is obtained.

5 reagents or materials

Unless otherwise stated, the reagents used in this document are nitrogen-free, analytically pure reagents. 5.1 Helium (He). purity not less than 99.99%. 5.2 Carbon dioxide (CO2). purity not less than 99.99%. 5.3 Oxygen (O2). purity not less than 99.99%. 5.4 Standard material. glycine (CAS number. 56-40-6) or aspartic acid (CAS number. 56-84-8) or nicotinamide (CAS number. 98-92- 0) or niacin (CAS number. 59-67-6) or ethylenediaminetetraacetic acid (CAS number. 60-00-4), with a purity of not less than 99%. 5.5 Combustion aid. sucrose, cellulose and other nitrogen-free sugar reagents. 5.6 Reducing agent. copper or tungsten. 5.7 Adsorbent. aluminum trioxide, phosphorus pentoxide, magnesium perchlorate, sodium carbonate. 5.8 Water absorbing agent. magnesium oxide.

6 Instruments and Equipment

6.1 Dumas nitrogen analyzer. equipped with a thermal conductivity detector. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42955-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42955-2023_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 42955-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42955-2023_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.