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GB/T 23944-2023 English PDF

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GB/T 23944-2023: General method for the determination of aluminium in inorganic chemical products - Chromazurol S spectrophotometric method
Status: Valid

GB/T 23944: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 23944-2023	English	189	Add to Cart	3 days [Need to translate]	General method for the determination of aluminium in inorganic chemical products - Chromazurol S spectrophotometric method	Valid	GB/T 23944-2023
GB/T 23944-2009	English	319	Add to Cart	3 days [Need to translate]	Inorganic chemicals for products use -- General method for determination of aluminium -- Chrome azurol S-spectrophotometric method	Obsolete	GB/T 23944-2009

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Basic data

Standard ID	GB/T 23944-2023 (GB/T23944-2023)
Description (Translated English)	General method for the determination of aluminium in inorganic chemical products - Chromazurol S spectrophotometric method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G10
Classification of International Standard	71.060.01
Word Count Estimation	10,115
Date of Issue	2023-09-07
Date of Implementation	2024-04-01
Older Standard (superseded by this standard)	GB/T 23944-2009
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 23944-2023: General method for the determination of aluminium in inorganic chemical products - Chromazurol S spectrophotometric 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 71.060.01 CCSG10 National Standards of People's Republic of China Replace GB/T 23944-2009 General method for determination of aluminum in inorganic chemical products Chrome Azure S Spectrophotometry Published on 2023-09-07 2024-04-01 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. This document replaces GB/T 23944-2009 "General method for determination of aluminum in inorganic chemical products Chromium Azur S Spectrophotometric Method" and is consistent with Compared with GB/T 23944-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The detection range has been changed (see Chapter 1, Chapter 1 of the.2009 edition); b) Changed the mass concentration of chromium azure S solution (see 5.3, 6.2 of the.2009 edition); c) Changed the mass concentration of cetyltrimethylammonium bromide solution (see 5.4, 6.3 of the.2009 edition); d) Changed the working curve drawing (see 7.3, 8.3 of the.2009 version); e) The value (m0) of the mass of aluminum in the blank test solution in the formula is deleted (see Chapter 9 of the.2009 edition). 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 Chemical Standardization Technical Committee (SAC/TC63). This document was drafted by. Zhejiang Dayang Biotechnology Group Co., Ltd., Zhejiang Huayou Cobalt Co., Ltd., Shenzhen Jiayao Ecological Environmental Protection Technology Co., Ltd., Chinalco Zhengzhou Nonferrous Metal Research Institute Co., Ltd., Baiyin Zhongtian Chemical Co., Ltd., Donghua University of Science and Technology Science, CNOOC Tianjin Chemical Research and Design Institute Co., Ltd. The main drafters of this document. Shi Zhuo, Lei Yangui, Wang Yixian, Zhang Yingying, Dong Zequn, Zhang Zhibin, Ding Ling, Chen Bei, Lu Yaming, Ling Xiaoqiang, Zheng Biqiang, Xiao Caixia. This document was first published in.2009 and this is the first revision. General method for determination of aluminum in inorganic chemical products Chrome Azure S Spectrophotometry Warning. Personnel using this document must have practical experience in regular laboratory work. This document does not identify all possible security issues. Users are responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in relevant national regulations.

1 Scope

This document describes the general method for the determination of aluminum in inorganic chemical products, the principle, reagents or materials, and instruments of the chromium azure S spectrophotometric method. Equipment, test procedures, test data processing and tolerances. This document is suitable for the determination of aluminum content in inorganic chemical products, with a detection range of 0.02μg/mL~0.16μg/mL. In Appendix A Interfering elements are listed.

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 6682 Specifications and test methods for water used in analytical laboratories HG/T 3696.2 Preparation of standard solutions, preparations and products for chemical analysis of inorganic chemical products Part 2.Impurity standard solutions Preparation of liquid

3 Terms and definitions

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

4 Principles

After the sample is processed, a solution is formed. In the acetic acid-sodium acetate buffer medium with a pH value of about 5.5, Al3, chromium azure S and hexadecane The reaction of methyltrimethylammonium bromide produces a blue ternary complex, and the absorbance is measured at a wavelength of 640nm with a spectrophotometer to calculate the aluminum content.

5 reagents or materials

5.1 Test reagents and water. When no other requirements are noted, they should be analytically pure reagents and grade three water specified in GB/T 6682.for testing Impurity standard solutions, unless other requirements are noted, shall be prepared in accordance with the provisions of HG/T 3696.2. 5.2 Acetic acid-sodium acetate buffer solution. pH value is 5.5±0.1, weigh 34.0g sodium acetate (CH3COONa·3H2O) and dissolve it in 450mL In water, add 2.0mL glacial acetic acid and dilute to 500mL with water. 5.3 Chromium Azure S solution. 0.5g/L, weigh 0.100g of Chromium Azure S and dissolve it in 100mL of absolute ethanol, and dilute to.200mL with water. 5.4 Cetyltrimethylammonium bromide solution. 0.5g/L, weigh 0.0500g cetyltrimethylammonium bromide, dissolve in water, and transfer In a 100mL volumetric flask, dilute to the mark and shake gently. Use heat to dissolve if necessary.

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