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GB/T 8643-2021: Determination of lubricant content in lubricated metal-powder mixes - Soxhlet extraction method
Status: Valid GB/T 8643: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8643-2021 | English | 134 |
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Determination of lubricant content in lubricated metal-powder mixes - Soxhlet extraction method
| Valid |
GB/T 8643-2021
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| GB/T 8643-2002 | English | 319 |
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Lubricated metal-powder mixes -- Determination of lubricant content -- Modified Soxhlet extraction method
| Obsolete |
GB/T 8643-2002
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| GB/T 8643-1988 | English | 199 |
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Lubricated metallic powders--Determination of lubricant content--Soxhlet extraction method
| Obsolete |
GB/T 8643-1988
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PDF similar to GB/T 8643-2021
Basic data | Standard 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
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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
foreword
This 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 extraction
1 Scope
This 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 references
There are no normative references in this document:
3 Terms and Definitions
There are no terms and definitions that need to be defined in this document:
4 Principles
Extract 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 materials
5:1 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":
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