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GBZ42521-2023 English PDF

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US$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GBZ42521-2023: Iron ores - Recommended procedures for iron ore dissolution using either acid digestion or alkali fusion
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/Z 42521-2023	259	Add to Cart	3 days	Iron ores - Recommended procedures for iron ore dissolution using either acid digestion or alkali fusion	Valid

Similar standards

GB/T 38812.1 GB/T 38812.2 GB/T 37829 GB/T 42523 GB/T 42522

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

---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.
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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GBZ42521-2023_English be delivered?

Answer: Upon your order, we will start to translate GBZ42521-2023_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 GBZ42521-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GBZ42521-2023_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.