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GB/T 6609.35-2023 English PDF

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GB/T 6609.35-2023: Chemical analysis methods and determination of physical performance of alumina - Part 35: Determination of specific surface area - Nitrogen adsorption method
Status: Valid

GB/T 6609.35: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6609.35-2023	269	Add to Cart	3 days	Chemical analysis methods and determination of physical performance of alumina - Part 35: Determination of specific surface area - Nitrogen adsorption method	Valid
GB/T 6609.35-2009	399	Add to Cart	3 days	Chemical analysis methods and determination of physical performance of alumina -- Part 35: Determination of specific surface area by nitrogen adsorption	Obsolete

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Basic data

Standard ID: GB/T 6609.35-2023 (GB/T6609.35-2023)
Description (Translated English): Chemical analysis methods and determination of physical performance of alumina - Part 35: Determination of specific surface area - Nitrogen adsorption method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H30
Classification of International Standard: 71.100.10
Word Count Estimation: 14,131
Date of Issue: 2023-08-06
Date of Implementation: 2024-03-01
Older Standard (superseded by this standard): GB/T 6609.35-2009
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 6609.35-2023: Chemical analysis methods and determination of physical performance of alumina - Part 35: Determination of specific surface area - Nitrogen adsorption 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 71.100.10 CCSH30 National Standards of People's Republic of China Replace GB/T 6609.35-2009 Alumina chemical analysis methods and physical properties determination methods Part 35.Determination of specific surface area Nitrogen adsorption method Published on 2023-08-06 Implemented on 2024-03-01 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. This document is Part 35 of GB/T 6609 "Chemical Analysis Methods and Physical Properties Determination Methods of Alumina". GB/T 6609 has been The following sections were published. ---Part 1.Determination of trace element content by inductively coupled plasma atomic emission spectrometry; ---Part 2.Determination of mass loss at 300℃ and 1000℃; ---Part 3.Determination of silica content by molybdenum blue photometry; ---Part 4.Determination of ferric oxide content by photometric method of o-phenanthroline; ---Part 5.Determination of sodium oxide content; ---Part 6.Determination of potassium oxide content; ---Part 7.Determination of titanium dioxide content by photometric method using diantipyrinomethane; ---Part 8.Determination of chromium trioxide content by diphenylcarbazide photometric method; ---Part 9.Determination of copper oxide content by new cuprophotometric method; ---Part 10.Determination of vanadium pentoxide content by benzoyl phenyl hydroxylamine extraction photometry; ---Part 11.Determination of manganese monoxide content by flame atomic absorption spectrometry; ---Part 12.Determination of zinc oxide content by flame atomic absorption spectrometry; ---Part 13.Determination of calcium oxide content by flame atomic absorption spectrometry; ---Part 14.Determination of fluorine content by lanthanum-alizarin complex ketone spectrophotometry; ---Part 15.Determination of chlorine content by iron thiocyanate photometric method; ---Part 16.Spectrophotometric determination of boron trioxide content in curcumin; ---Part 17.Determination of phosphorus pentoxide content by molybdenum blue spectrophotometry; ---Part 18.Determination of sulfate content by N,N-dimethyl-p-phenylenediamine spectrophotometry; ---Part 19.Determination of lithium oxide content by flame atomic absorption spectrometry; ---Part 20.Determination of magnesium oxide content by flame atomic absorption spectrometry; ---Part 21.Determination of gallium trioxide content by butylrhodamine B spectrophotometry; ---Part 22.Sampling; ---Part 23.Preparation and storage of specimens; ---Part 24.Determination of angle of repose; ---Part 25.Determination of loose and tapped density; ---Part 26.Determination of effective density by pycnometer method; ---Part 27.Particle size analysis and screening method; ---Part 29.Determination of adsorption index; ---Part 30.Determination of trace element content by wavelength dispersive X-ray fluorescence spectrometry; ---Part 31.Determination of flow angle; ---Part 32.Determination of α-aluminum oxide content by X-ray diffraction method; ---Part 33.Determination of wear index; ---Part 34.Calculation method of aluminum oxide content; ---Part 35.Determination of specific surface area by nitrogen adsorption method; ---Part 36.Determination of flow time. This document replaces GB/T 6609.35-2009 "Methods for chemical analysis and physical properties of alumina - Part 35.Specific surface "Nitrogen adsorption method for determination of product volume", compared with GB/T 6609.35-2009, in addition to structural adjustments and editorial changes, the main technical changes as follows. a) Changed the sample specific surface area test range (see Chapter 1, Chapter 1 of the.2009 edition); b) Changed the weighing range (see Chapter 7, Chapter 5 of the.2009 edition); c) The sample degassing temperature has been changed (see 8.2.2, 6.2.2 of the.2009 version); d) The relative pressure value range has been changed (see 8.1.1, 6.1.2 of the.2009 version). This document is modified to adopt ISO 8008.2005 "Determination of specific surface area by aluminum oxide nitrogen adsorption method mainly used in aluminum production". Compared with ISO 8008.2005, this document has many structural adjustments. See the comparison list of structural number changes between the two documents. Appendix A. Compared with ISO 8008.2005, this document has many technical differences. Vertical single words are used in the outer margins of the clauses involved. Lines (|) are marked. A list of these technical differences and their causes is provided in Appendix B. The following editorial changes have been made to this document. ---Modify the standard name to "Methods for chemical analysis and physical properties of alumina - Part 35.Determination of specific surface area" Nitrogen adsorption method"; ---Change "high purity" to "volume fraction greater than 99.99%" (see 5.2); ---Deleted the notes in 4.4 and 7.1 of ISO 8008.2005; ---Simplified the calculation of specific surface area (see 8.2.3 and Chapter 9); ---Deleted ISO 8008.2005 Appendix B (informative) "Measurement results of the test process". 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 the China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). This document was drafted by. Chinalco Zhengzhou Nonferrous Metals Research Institute Co., Ltd., Chinalco Shanxi New Materials Co., Ltd., Chinalco Mining Co., Ltd. Division, Shandong Hongqiao New Materials Co., Ltd., Shandong Nanshan Aluminum Co., Ltd., Guangxi Tiandong Jinxin Chemical Co., Ltd. The main drafters of this document. Kou Fan, Ma Yanhong, Cang Xianghui, Zhang Jingbo, Liang Dongmei, Chen Xu, Zhao Yafei, Chen Yongjun, Shao Benling, Liu Chunmeng, Yang Qingyan, Fang Hui, Wang Xiaolei, Wang Mingli, Liu Songhao. The previous versions of this document and the documents it replaces are as follows. ---First published as GB/T 6609.35-2009 in.2009; ---This is the first revision.

Introduction

Alumina is the main raw material of the aluminum industry. In the standard system of the aluminum industry, GB/T 6609 "Chemical Analysis Methods and Materials of Alumina" "Rational Performance Determination Method" is a very important part and plays an important role in ensuring the quality of alumina products. The standard service It provides technical support for the high-quality development of my country's aluminum industry in alumina and electrolytic aluminum production, trade settlement, etc. GB/T 6609 is a standard for chemical analysis methods and physical properties determination methods of alumina, including silicon, iron, sodium, potassium, Methods for determination of titanium, chromium, copper, vanadium, manganese, zinc, calcium, fluorine, chlorine, boron, phosphorus, sulfate, lithium, magnesium, gallium, moisture, alpha-alumina and other components, and The determination method of indicators such as angle of repose, density, particle size distribution, adsorption index, flow angle, wear index, specific surface area, flow time, etc., shall be determined in accordance with the test The object is proposed to be divided into 35 parts. GB/T 6609.35 is a method for determining the specific surface area of alumina. This revision expands the specific surface area measurement based on the current status of alumina products. According to the detection results, the sample degassing temperature and relative pressure range were improved, and the sample weighing range was determined to meet the needs of our country. Requirements for alumina testing and quality control. Alumina chemical analysis methods and physical properties determination methods Part 35.Determination of specific surface area Nitrogen adsorption method

1 Scope

This document describes a method for the determination of the specific surface area (SSA) of alumina using the nitrogen adsorption method. This document is applicable to the determination of the specific surface area of alumina. The measurement range is. 50.0m2/g~150.0m2/g.

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 6609.22 Sampling methods for chemical analysis and physical property determination of alumina (GB/T 6609.22-2004, ISO 2927.1973,MOD) GB/T 6609.23 Preparation and storage of samples for chemical analysis and physical property determination of alumina (GB/T 6609.23- 2004, ISO 802.1976, MOD) GB/T 8170 Numerical rounding rules and expression and determination of limit values

3 Terms and definitions

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

4 Method Principle

Degas the sample at 300°C for 2 hours under vacuum or flowing nitrogen, weigh the sample, and determine the nitrogen adsorbed on the surface of the sample based on the boiling point of liquid nitrogen. Ability, use an instrument to measure the adsorption capacity of the sample, and calculate the ratio table of the sample according to the adsorption theory proposed by "Bronauer-Emmett-Teller" area.

5 reagents or materials

Warning. Use extreme caution when handling cryogenic liquids to prevent frostbite. 5.1 Liquid nitrogen. Boiling point at 101.3kPa is -196°C. 5.2 Nitrogen. the volume fraction is greater than 99.99%. 5.3 Other gases. Determine according to the instrument instructions. 5.4 Alumina standard sample. If the SSA value is in the range of 50m2/g~150m2/g, GB W13911 should be used.

6 Instruments and Equipment

6.1 Specific surface area analyzer. It can adsorb nitrogen at -196°C and can perform single-point or multi-point analysis. Single point method and multi-point method ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 6609.35-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 6609.35-2023_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 6609.35-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 6609.35-2023_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.

Question 5: Should I purchase the latest version GB/T 6609.35-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6609.35-2023 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.