HOME   Cart(1)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189760 (18 Oct 2025)

JJF 1961-2022 English PDF

US$439.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1961-2022: Metrological Technical Specification for Purity Assessment of Certified Reference Materials - High Purity Metal Certified Reference Materials
Status: Valid
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJF 1961-2022English439 Add to Cart 4 days [Need to translate] Metrological Technical Specification for Purity Assessment of Certified Reference Materials - High Purity Metal Certified Reference Materials Valid JJF 1961-2022

Standard similar to JJF 1961-2022

JJF 1033   JJF 1050   JJF 1030   

Basic data

Standard ID JJF 1961-2022 (JJF1961-2022)
Description (Translated English) Metrological Technical Specification for Purity Assessment of Certified Reference Materials - High Purity Metal Certified Reference Materials
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 20,297
Date of Issue 2022-04-29
Date of Implementation 2022-10-29
Issuing agency(ies) State Administration for Market Regulation

JJF 1961-2022: Metrological Technical Specification for Purity Assessment of Certified Reference Materials - High Purity Metal Certified Reference Materials


---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.
Metrological Technical Specification for Purity Assessment of Certified Reference Materials - High Purity Metal Certified Reference Materials National Metrology Technical Specifications of the People's Republic of China Purity standard substance definite value measurement technical specification High purity metal purity reference material Released on 2022-04-29 Implementation on 2022-10-29 Released by the State Administration for Market Regulation Purity standard substance definite value measurement technical specification High purity metal purity reference material Responsible unit. National Standard Substance Metrology Technical Committee Main drafting unit. China Institute of Metrology Participating in the drafting unit. Shanghai Materials Research Institute National Standard (Beijing) Inspection and Certification Co., Ltd. Steel Research Nanoco Testing Technology Co., Ltd. This specification entrusts the National Standard Substance Metrology Technical Committee to be responsible for interpretation The main drafters of this specification. Zhou Tao (National Institute of Metrology) Cui Yanjie (National Institute of Metrology) Wu Bing (National Institute of Metrology) Zhang Jianying (National Institute of Metrology) Participating drafters. Ma Chongxian (Shanghai Materials Research Institute) Chen Xiongfei (GB (Beijing) Inspection and Certification Co., Ltd.) Tang Benling (Steel Research Nanoco Testing Technology Co., Ltd.)

Table of contents

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 terms(1) 4 General requirements(1) 4.1 Screening and pretreatment of reference material candidates (1) 4.2 Qualitative analysis of reference materials (1) 4.3 Principles of Purity Valuation Method (1) 5 Classification, principle and key points of valuation methods (2) 5.1 Direct measurement method(2) 5.2 Impurity element deduction method (3) 6 Evaluation of fixed value and uncertainty (4) 6.1 Statutory value of deduction of impurity elements (4) 6.2 Coulomb value(5) 6.3 Combined Standard Uncertainty and Expanded Uncertainty(7) 7 Metrological traceability(7) 8 Value expression (8) Appendix A Examples of High Purity Copper Purity Determination (9)

Introduction

This specification is used to standardize the denomination of high-purity metal purity standard substances in my country. This specification is published for the first time. Purity standard substance definite value measurement technical specification High purity metal purity reference material

1 Scope

This specification is applicable to the development of high-purity metal purity standard substances, and the determination of pure metal purity can also refer to use.

2 References

This specification references the following documents. General terms and definitions of JJF 1005 reference materials JJF 1342 General requirements for reference material development (production) institutions JJF 1343 General Principles and Statistical Principles for Valuation of Standard Substances JJF 1507 Selection and application of reference materials For dated references, only the dated version applies to this specification; for undated references document, its latest version (including all amendments) applies to this specification.

3 terms

The terms and definitions defined in JJF 1005 and below apply to this specification. The proportion of main elements in high-purity metals is usually expressed in mass fraction (% or g/g) and its multiples. On the premise that the sum of the element mass fractions is 100%, by subtracting the total amount of all impurity elements, the Method for obtaining the chemical purity value of an element.

4 General requirements

4.1 Screening and pretreatment of standard substance candidates 4.1.1 Under the premise of reasonable cost, select samples with relatively high purity, good uniformity and stability. NOTE. Can be commercially available, custom-made, or re-prepared samples. 4.1.2 Samples should be in a form that is easy to clean the surface (such as columns, flakes, chips, etc.), to reduce the possibility of contamination such as cutting operate. Note. The selection of samples should avoid the powder form, and consider the convenience of weighing and adapt to the measurement method. 4.1.3 Before the sample is measured, the surface should be cleaned according to an appropriate method to remove surface pollutants and oxide layers. 4.2 Qualitative analysis of reference materials Qualitative analysis was performed by mass spectrometry or spectroscopy to ensure that the element types of the main components of the candidates meet the expected requirements. 4.3 Principles of Purity Valuation Method 4.3.1 Two methods can be used to measure the purity of pure metals. one is the direct measurement method, which directly measures the content of main elements;

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1961-2022_English be delivered?

Answer: Upon your order, we will start to translate JJF 1961-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1961-2022_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1961-2022_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 [email protected]. 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.