GB/T 22279-2008 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 22279-2008: Guide for development of certified reference materials for the composition analysis and the physical property measurements of coal Status: Valid
Basic dataStandard ID: GB/T 22279-2008 (GB/T22279-2008)Description (Translated English): Guide for development of certified reference materials for the composition analysis and the physical property measurements of coal Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: D21 Classification of International Standard: 73.040 Word Count Estimation: 12,159 Date of Issue: 2008-08-07 Date of Implementation: 2009-03-01 Quoted Standard: GB 474; GB 8170; JJG 1006-1994 Regulation (derived from): National Standard Approval Announcement 2008 No.12 (Total No.125) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the analytical measurement standard material composition and preparation of coal, homogeneity testing, stability test, given value and uncertainty assessment procedures and reference material packaging, writing requires preservation and reference material certificate. This standard applies to coal composition analysis and development of measurement standards and replicate the physical properties of materials. GB/T 22279-2008: Guide for development of certified reference materials for the composition analysis and the physical property measurements of coal---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. Guide for development of certified reference materials for the composition analysis and the physical property measurements of coal ICS 73.040 D21 National Standards of People's Republic of China Coal composition analysis and physical property measurement Reference material development guidelines 2008-08-07 released 2009-03-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released ForewordThis standard is first formulated. This standard is proposed by China Coal Industry Association. This standard by the National Coal Standardization Technical Committee (SAC/TC42) centralized. This standard was drafted. Coal Research Institute of Coal Analysis Laboratory (National Coal Quality Supervision and Inspection Center). The main drafters of this standard. Li Yinghua, Zhang Kerui, Sun Gang, Wang Wenliang. Coal composition analysis and physical property measurement Reference material development guidelines1 ScopeThis standard specifies the preparation of coal composition analysis and physical properties of measurement standards, uniformity test, stability test, set value and Uncertainty assessment procedures and standards for the packaging, preservation and preparation of standard substance certification requirements. This standard applies to the composition of coal analysis and physical characteristics of the measurement of the development and replication of standard substances.2 Normative referencesThe following documents contain provisions which, through reference in this standard and become the standard terms. All dated references, which are subsequently owned Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to reach an agreement based on this standard research Whether you can use the latest versions of these files. For undated references, the latest version applies to this standard. Preparation of GB 474 coal sample (GB 474-1996, eqv ISO 1988. 1975) GB 8170 number rounding rules JJG1006-1994 a standard material Preparation of 3 standard substances 3.1 Candidate choice of coal samples 3.1.1 Candidate samples should be suitable for the intended use, easy to obtain and copy, and its basic characteristics (content, coal or matrix composition, etc.) and application areas The daily test object is similar, and the characteristics of the undetermined characteristics have longer-term stability. Copy candidate coal samples of the species and the main characteristics of the amount should be with the original The standard material as close as possible. 3.1.2 series of coal composition analysis and physical characteristics of the standard sample candidate coal sample to be determined quantitative values should be reasonable to meet the requirements The content of the gradient, as much as possible to cover a larger measurement range. 3.1.3 Generally, a candidate coal sample shall be taken from the same coal type or the same batch of commodity coal at the same mine site; if necessary, However, both coal and matrix are similar to the two kinds of coal preparation. 3.1.4 Candidate coal samples should be sufficient in quantity to meet the usage during the life and market needs. 3.1.5 candidate coal samples before preparation or before the preparation of the required particle size, should be extracted 1-2 samples for pre-detection of the value of the characteristics to be determined, if the determination Similar to the expected target value, the sample preparation step can be followed; if the measured value and the expected target value vary widely, measures should be taken (re-mining Select candidate coal samples, or coal samples with the same matrix) to make the candidate coal sample to be determined the magnitude of the expected value is close to the expected value. 3.2 Sample Preparation 3.2.1 Sample preparation and packaging should be in line with the requirements of GB 474, and the ambient temperature does not exceed 30 ℃, the relative humidity of not more than 75% of the sample Indoor. 3.2.2 According to the nature and quantity of selected coal samples, as well as the nature of the value to be quantified, choose a reasonable broken, drying, screening, mixing and shrinking division sequence. The coal samples with too high water content should be prepared after proper drying. The samples with the required particle size range should be prepared by stepwise crushing method. 3.2.3 Sample size should be consistent with the method of quantitative measurement requirements. 3.2.4 prepared to the appropriate size of the coal sample, should take effective blending methods, such as rotating in a ball mill for a certain period of time or repeated pile reactor doped Times and make it fully mixed, and placed at room temperature for a sufficient time to reach the air dry state and then sub-packaging to the smallest unit. To be Determined by the characteristics of coal samples oxidative deterioration significantly affected the sample should be as much as possible in the same day, up to no more than two days to complete the packing. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 22279-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 22279-2008_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 GB/T 22279-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 22279-2008_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. 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