|
US$489.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1855-2020: Metrological Technical Specification for Purity Assessment of Certified Reference Materials - Organic Purity Certified Reference Materials
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJF 1855-2020 | English | 489 |
Add to Cart
|
4 days [Need to translate]
|
Metrological Technical Specification for Purity Assessment of Certified Reference Materials - Organic Purity Certified Reference Materials
| Valid |
JJF 1855-2020
|
PDF similar to JJF 1855-2020
Standard similar to JJF 1855-2020 JJG 1094 JJF 1441 JJF 1644 Basic data | Standard ID | JJF 1855-2020 (JJF1855-2020) | | Description (Translated English) | Metrological Technical Specification for Purity Assessment of Certified Reference Materials - Organic Purity Certified Reference Materials | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A66 | | Word Count Estimation | 21,282 | | Date of Issue | 2020-09-11 | | Date of Implementation | 2021-03-11 | | Regulation (derived from) | Announcement No. 40 (2020) of the State Administration for Market Regulation | | Issuing agency(ies) | State Administration for Market Regulation | JJF 1855-2020: Metrological Technical Specification for Purity Assessment of Certified Reference Materials - Organic Purity 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 - Organic Purity Certified Reference Materials
National Metrology Technical Specifications of the People's Republic of China
Technical specification for fixed value measurement of purity standard material
Organic Purity Standards
2020-09-11 released
2021-03-11 implementation
Issued by the State Administration for Market Regulation
Technical specification for fixed value measurement of purity standard material
Organic Purity Standards
Focal point. National Technical Committee for Standard Material Measurement
Main drafting unit. China Institute of Metrology
Participated in the drafting unit. Institute of Materia Medica, Chinese Academy of Medical Sciences
This specification is interpreted by the National Technical Committee for Reference Material Measurement
The main drafters of this specification.
Li Hongmei (China Institute of Metrology)
Huang Ting (China Institute of Metrology)
Zhang Wei (China Institute of Metrology)
Participating drafters.
Lu Yang (Institute of Materia Medica, Chinese Academy of Medical Sciences)
Yang Shiying (Institute of Materia Medica, Chinese Academy of Medical Sciences)
table of Contents
Introduction (Ⅱ)
1 scope (1)
2 Reference documents (1)
3 Term (1)
3.1 Organic purity (1)
3.2 Mass balance method (1)
3.3 Quantitative nuclear magnetic resonance method (1)
3.4 Thermal analysis method (1)
4 General requirements (1)
4.1 Screening of candidate reference materials (1)
4.2 Qualitative analysis of reference materials (1)
4.3 Principles for the selection of purity determination methods (2)
5 Classification, principles and requirements of valuation methods (2)
5.1 Mass balance method (2)
5.2 Quantitative nuclear magnetic resonance method (2)
5.3 Thermal analysis method (3)
5.4 Coulomb method (3)
5.5 Titration (3)
5.6 Density method (4)
5.7 Molecular spectroscopy (external standard correction method) (4)
6 Evaluation of fixed value and uncertainty (4)
6.1 Mass balance method (4)
6.2 Quantitative nuclear magnetic resonance method (12)
6.3 Thermal analysis method (12)
6.4 The combination of fixed value results and uncertainty (14)
6.5 Uncertainty of uniformity and stability (15)
6.6 Uncertainty of composite standard (15)
6.7 Expanded uncertainty (15)
7 Description of Metrological Traceability (15)
7.1 General requirements (15)
7.2 Specific method requirements (15)
Introduction
The organic purity standard material is an important part of the standard material, and it is the source calibration for the measurement of complex matrix organic matter
standard. This specification is based on the "International Union of Pure and Applied Chemistry Technical Report on Organic Purity-Purity of Organic Compounds"
Established on the basis of "SI Valuation Method" to standardize my country's organic purity standards
The fixed value of the substance.
This specification is released for the first time.
Technical specification for fixed value measurement of purity standard material
Organic Purity Standards
1 Scope
This specification is applicable to guide homogeneous organic matter with a clear molecular structure (usually relative molecular mass < 5000)
The determination of purity of the product and the development of its purity standard material.
2 Reference documents
JJF 1005 General terms and definitions of reference materials
JJF 1343 General Principles and Statistical Principles of the Value of Reference Materials
Selection and application of JJF 1507 reference materials
The Organic Purity Technical Report of the International Union of Pure and Applied Chemistry---SI Determining the Purity of Organic Compounds
For dated reference documents, only the dated version applies to this specification; for undated reference documents,
The latest version (including all amendments) is applicable to this specification.
3 term
The following terms and definitions defined by JJF 1005 apply to this specification.
3.1 Organic purity
The content of the main component in the organic compound. Usually expressed in mass fraction (g/g) and its multiples, referred to as purity.
3.2 Mass balance method
Under the premise that the total mass fraction of the tested substance is 100%, by deducting the content of all impurity components,
The method to obtain the content of the main ingredient, that is, the purity.
3.3 Quantitative NMR method
Based on the proportional relationship between the integral area of the signal in the nuclear magnetic resonance spectrum and the number of nuclei that produce the corresponding resonance spectrum
It is a method for determining the purity of a substance.
3.4 Thermal analysis method
According to the relationship between the melting point of the substance and the purity, based on the van't Hoff equation, the method of calculating the purity of the substance.
4 General requirements
4.1 Screening of reference material candidates
Under the premise of reasonable cost, samples with relatively high purity, good uniformity and stability should be selected, which can be
Commercial, customized or reprocessed samples.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JJF 1855-2020_English be delivered?Answer: Upon your order, we will start to translate JJF 1855-2020_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 1855-2020_English with my colleagues?Answer: Yes. The purchased PDF of JJF 1855-2020_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+ countriesQuestion 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.
|