GB/T 2384-2021 English PDFUS$159.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 2384-2021: Dyes intermediates - General method for the determination of melting range Status: Valid GB/T 2384: Historical versions
Basic dataStandard ID: GB/T 2384-2021 (GB/T2384-2021)Description (Translated English): Dyes intermediates - General method for the determination of melting range Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G55 Word Count Estimation: 7,725 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 2384-2021: Dyes intermediates - General method for the determination of melting range---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.Dyes intermediates -- General method for the determination of melting range ICS 71:100:01; 87:060:10 CCSG55 National Standards of People's Republic of China Replacing GB/T 2384-2015 General method for determination of melting point range of dye intermediates Published on 2021-12-31 2022-07-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration forewordThis document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted: This document replaces GB/T 2384-2015 "General Method for Determination of Melting Point Range of Dyestuff Intermediates", which is consistent with GB/T 2384-2015 In addition to structural adjustments and editorial changes, the main technical changes are as follows: a) Added normative references (see Chapter 2); b) Changed terms and definitions (see Chapter 3, Chapter 2 of the:2015 edition); c) Changed the requirements for reagents and materials (see Chapter 4 of 4:1:2,:2015 edition); d) Added general requirements for thermometers (see 4:1:3:2); e) Changed the requirements for heaters (see 4:1:4:1, 5:3:1 of the:2015 edition); f) The rounding requirements for calculation results are added (see 4:1:5:4); g) Added capillary melting point test method (see 4:2): Please note that some content of this document may be patented: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by China Petroleum and Chemical Industry Federation: This document is under the jurisdiction of the National Dyestuff Standardization Technical Committee (SAC/TC134): This document is drafted by: Zhejiang Dibang Chemical Co:, Ltd:, Zhejiang Boao New Materials Co:, Ltd:, Anhui Bayi Chemical Co:, Ltd: Company, Shenyang Chemical Research Institute Co:, Ltd:, Shenyang Shenyang Chemical Research Institute Testing Technology Co:, Ltd:, Transfar Zhilian Co:, Ltd:, National Dyestuff Quality Supervision and Inspection Center: The main drafters of this document: Yang Baode, Xu Wanfu, Meng Xiangqi, Peng Dexin, Xue Yan, Fu Weisong, Wen Weidong, Dong Rusheng, Yang Jiemin, Chen Sujuan, Lu Shuang: The previous versions of this document and its superseded documents are as follows: ---First published in 1980 as GB 2384-1980; ---The first revision in:1992 was GB/T 2384-1992, the second revision in:2007, and the third revision in:2015; ---This is the fourth revision: General method for determination of melting point range of dye intermediates1 ScopeThis document specifies a general method for the determination of the melting point of dye intermediates by the capillary liquid bath method and the capillary melting point apparatus: This document applies to the determination of the melting point of crystalline or powdered dye intermediates:2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document: GB/T 8170-2008 Numerical Rounding Rules and Representation and Judgment of Limit Values JJG130-2011 Working glass liquid thermometer JJG701-2008 Melting point tester3 Terms and DefinitionsThe following terms and definitions apply to this document: 3:1 melting range The temperature range when the sample appears obvious droplets in the capillary to completely melted: Note: Also known as fusion range or fusion distance: 3:2 initialmeltingpoint The temperature at which the sample begins to melt locally in the capillary tube and noticeably droplets appear: 3:3 final melting point finalmeltingpoint The temperature at which the sample is completely melted in the capillary:4 Test methodsWARNING - Persons 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 to ensure compliance with the conditions stipulated by relevant national regulations: 4:1 Capillary liquid bath method (arbitration method) 4:1:1 Method principle By heating the liquid medium, the temperature of the sample in the capillary is gradually increased from its initial melting temperature to a temperature higher than its final melting temperature: Visually observe the temperature of initial melting and final melting to determine the melting point range of the sample: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 2384-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 2384-2021_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 2384-2021?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 2384-2021 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
