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GBZ42521-2023: Iron ores - Recommended procedures for iron ore dissolution using either acid digestion or alkali fusion
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/Z 42521-2023 | English | 259 |
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Iron ores - Recommended procedures for iron ore dissolution using either acid digestion or alkali fusion
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GB/Z 42521-2023
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Basic data | Standard ID | GB/Z 42521-2023 (GB/Z42521-2023) | | Description (Translated English) | Iron ores - Recommended procedures for iron ore dissolution using either acid digestion or alkali fusion | | Sector / Industry | National Standard | | Classification of Chinese Standard | D31 | | Classification of International Standard | 73.060.10 | | Word Count Estimation | 12,173 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-12-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GBZ42521-2023: Iron ores - Recommended procedures for iron ore dissolution using either acid digestion or alkali fusion
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GB /Z 42521-2023: Acid dissolution or alkali fusion method for iron ore samples
ICS 73:060:10
CCSD31
National Standardization Guidance Technical Document of the People's Republic of China
Acid dissolution or alkali fusion method of iron ore samples
(ISO /T R11422:1996, MOD)
Released on 2023-05-23
2023-12-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
This document is modified to adopt ISO /T R11422:1996 "Acid Dissolution or Alkali Fusion Method for Iron Ore Samples", and the document type is changed from ISO
The technical report is adjusted to my country's national standardization guiding technical document:
Compared with ISO /T R11422:1996, this document has more adjustments in structure: Struct number changes between two files compared to one
See Appendix A for a list:
The technical differences between this document and ISO /T R11422:1996 and their reasons are as follows:
--- Replaced ISO 3696 with the normative reference GB/T 6682 (see 4:1:1:1:1, 4:1:2:1:1, 4:1:3:1:1, 4:2:1:1:1,
4:2:2:1:1, 4:3:1:1:1, 4:3:2:1:1), to adapt to the technical conditions of our country;
--- Added requirements for balances (see 4:1:1:2:4, 4:1:2:2:4, 4:1:3:2:4, 4:2:1:2:5, 4:2:2:2:2, 4:3:1:2:3, 4:3:2:2 :3), with
Meet the requirements of analytical precision;
--- Added requirements for corundum crucibles (see 4:2:2:2:1, 4:3:1:2:1, 4:3:2:2:1) to adapt to the technical conditions of laboratories in our country:
The following editorial changes have been made to this document:
--- Added Chapter 1, Chapter 2, Chapter 3 and Appendix A;
--- Deleted Chapter 1, Chapter 2, Chapter 3, Appendix A, Appendix B and Appendix C of ISO /T R11422:1996:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by China Iron and Steel Industry Association:
This document is under the jurisdiction of the National Iron Ore and Direct Reduced Iron Standardization Technical Committee (SAC/TC317):
This document is drafted by: Qingdao Bozheng Inspection Technology Co:, Ltd:, Qingdao Customs Technology Center, Jiangyin Xingcheng Special Steel Co:, Ltd:, Japan
According to Inspection and Certification Co:, Ltd:, Qingdao Yuancheng Zongheng Technology Co:, Ltd:, Qingdao Dehong Jinxin Technology Co:, Ltd:, Qingdao University of Technology, Metallurgical Industry
Industry Information Standards Institute:
The main drafters of this document: Guan Song, Zou Wenwen, Ding Shibing, Qi Jialin, Fan Yu, Luo Yuandong, Huang Zhen, Ni Xin, Wang Yixian, Ma Li, Liu Yilong,
Wu Chunrong, Zhang Qingjian, Ding Yang, Ren Jing, Wang Jing, Zhu Rong:
Acid dissolution or alkali fusion method of iron ore samples
Caution --- Personnel using this document should have practical experience in formal laboratory work: This document does not address all possible security issues
question: It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the relevant national laws and regulations:
1 Scope
This document describes acid dissolution or alkali fusion methods for iron ore samples:
This document is applicable to acid dissolution and alkali fusion of iron ore samples:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 20565 Terminology of iron ore and direct reduced iron
3 Terms and Definitions
The terms and definitions defined in GB/T 20565 apply to this document:
4 Recommended Operation Procedures
4:1 Acid dissolution
4:1:1 2g sample
4:1:1:1 Reagents
Unless otherwise specified, use only analytical grade reagents:
4:1:1:1:1 Water: GB/T 6682, level 3:
4:1:1:1:2 Anhydrous sodium carbonate (Na2CO3):
4:1:1:1:3 Anhydrous sodium tetraborate (Na2B4O7):
4:1:1:1:4 Hydrochloric acid: ρ=1:16g/mL~1:19g/mL:
4:1:1:1:5 Hydrochloric acid: ρ=1:16g/mL~1:19g/mL, dilute to 1:1:
4:1:1:1:6 Hydrochloric acid: ρ=1:16g/mL~1:19g/mL, dilute to 2100:
4:1:1:1:7 Nitric acid: ρ=1:4g/mL:
4:1:1:1:8 Sulfuric acid: ρ=1:84g/mL:
4:1:1:1:9 Sulfuric acid: ρ=1:84g/mL, dilute to 1:1:
4:1:1:1:10 Hydrofluoric acid: ρ=1:13g/mL, 40% (mass fraction) or ρ=1:19g/mL, 48% (mass fraction):
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