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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 8643-2021: Determination of lubricant content in lubricated metal-powder mixes - Soxhlet extraction method Status: Valid GB/T 8643: Historical versions
Basic dataStandard ID: GB/T 8643-2021 (GB/T8643-2021)Description (Translated English): Determination of lubricant content in lubricated metal-powder mixes - Soxhlet extraction method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H21 Word Count Estimation: 6,63 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 8643-2021: Determination of lubricant content in lubricated metal-powder mixes - Soxhlet extraction method---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. Determination of lubricant content in lubricated metal-powder mixes -- Soxhlet extraction method ICS 77:160 CCSH21 National Standards of People's Republic of China Replacing GB/T 8643-2002 Determination of lubricant content in lubricant-containing metal powders Soxhlet extraction (ISO 13944:2012, Lubricatedmetal-powdermixes-Determinationofflubricant 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 8643-2002 "Determination of Lubricant Content in Lubricated Metal Powders, Revised Soxhlet (Soxhlet) extraction method", compared with GB/T 8643-2002, in addition to structural adjustment and editorial changes, the main technical changes are as follows: a) Changed the description of the scope (see Chapter 1, Chapter 1 of the:2002 edition); b) Added the chapter "Normative References" (see Chapter 2); c) added the chapter "Terms and Definitions" (see Chapter 3); d) "Xylene" was added for organic solvents (see 5:3); e) added the automation system of Soxhlet extraction method (see 5:4); f) Deleted the content of blank test (see 5:1 of the:2002 edition); g) The description of weighing has been changed, and the content of ensuring that the filter paper is dry is added (see 7:1, 7:2, 5:2 and 5:3 of the:2002 edition); h) added another option for the final washing operation (see 7:6); i) Changed the description referring to ISO 4491 (see 7:8, 5:9 of the:2002 edition); j) Added the content that the powder should be homogenized before sampling and analysis (see 7:8): This document is identical to ISO 13944:2012 "Determination of lubricant content in metal powders containing lubricants" Soxhlet (Soxhlet) Extraction Law: Two chapters "Normative References" and "Terms and Definitions" have been added to this document: The following minimal editorial changes have been made to this document: --- Change the standard name to "Soxhlet Extraction Method for Determination of Lubricant Content in Lubricated Metal Powders": 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 Nonferrous Metals Industry Association: This document is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243): This document is drafted by: Institute of Materials and Processing, Guangdong Academy of Sciences, Industrial Analysis and Testing Center of Guangdong Academy of Sciences, Beijing Youyanfen Mo New Materials Research Institute Co:, Ltd:, Guizhou Academy of Sciences, Iron and Steel Research Institute: The main drafters of this document: Tan Lixin, Zheng Kaihong, Nong Deng, Cui Liang, Xu Qing, Chen Hanyue, Liang Zhongxiu, Ren Demeng, Xu Jing, Wang Juan, Luo Hao, Li Liping, Luo Zhiqiang, Li Lingxia: This document was first published as GB/T 8643-1988 in 1988, the first revision was in:2002, and this is the second revision: Determination of lubricant content in lubricant-containing metal powders Soxhlet extraction1 ScopeThis document specifies a method for the determination of lubricant content in lubricant-containing metal powders: The method is also suitable for preparing samples for elemental determination Contents, such as graphite and oxygen, the determination of which can be interfered with by the presence of lubricants: The conditions for applying this method are that suitable solvents for the extraction of lubricants are known and readily available:2 Normative referencesThere are no normative references in this document:3 Terms and DefinitionsThere are no terms and definitions that need to be defined in this document:4 PrinciplesExtract the lubricant from the weighed sample with a suitable solvent, weigh the sample after extraction, calculate the mass percentage lost, That is, the content of the extracted lubricant: After extraction, the content of other components can be determined by conventional methods without the interference of lubricants:5 Instruments and materials5:1 Analytical balance, capable of weighing the sintered glass filter crucible containing the sample (see 5:2:3), accurate to 1 mg: 5:2 Soxhlet device, as shown in Figure 1: No grease should be applied to the grinding mouth, which consists of the following components: 5:2:1 Spherical condenser: 5:2:2 Soxhlet extractor, the volume is 150mL~200mL: 5:2:3 Sintered glass filter crucible [pore size classification P1601)], filter paper (filtration speed 1000mL/min), glass wool and Glass tube, 30mm in diameter, and the length meets the requirements in 7:3: If the lubricant content of the sample to be tested is less than 0:5%, the above appliances should be rinsed with an organic solvent (see 5:3) before use: 5:2:4 A round-bottomed flask with a volume of 500mL, containing a boiling aid: 5:2:5 A heating mantle with sufficient power to evaporate the solvent at a rate of not less than 25mL/min: 1) See ISO 4793:1980 "Laboratory sintered (porous) filter pore size classification and grades": ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 8643-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 8643-2021_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 8643-2021?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8643-2021 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. |
