GB/T 22933-2022_English: PDF (GB/T22933-2022)
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Leather and fur - Chemical tests - Determination of free fatty acid
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GB/T 22933-2022
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| GB/T 22933-2008 | English | 239 |
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Leather and fur -- Chemical tests -- Determination of free fatty acid
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GB/T 22933-2008
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| Standard ID | GB/T 22933-2022 (GB/T22933-2022) | | Description (Translated English) | Leather and fur -- Chemical tests -- Determination of free fatty acid | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y46 | | Classification of International Standard | 59.140.30 | | Word Count Estimation | 10,155 | | Date of Issue | 2022-12-30 | | Date of Implementation | 2023-07-01 | | Older Standard (superseded by this standard) | GB/T 22933-2008 | | Drafting Organization | Shaanxi University of Science and Technology, Guangdong Meizhi Fashion Leather Co., Ltd., Zhejiang Shenghui Chemical Co., Ltd., Liming Vocational University, Jihua 3514 Leather and Shoes Co., Ltd., Qihe Lihou Chemical Co., Ltd., Zhejiang Tongtianxing Group Co., Ltd. , Inner Mongolia Autonomous Region Product Quality Inspection Research Institute, Zhongqing Inspection and Certification Co., Ltd., China Leather and Shoes Research Institute Co., Ltd., Jiaxing College | | Administrative Organization | National Leather Industry Standardization Technical Committee (SAC/TC 252) | | Proposing organization | State Administration for Market Regulation, National Standardization Management Committee | | Standard ID | GB/T 22933-2008 (GB/T22933-2008) | | Description (Translated English) | Leather and fur. Chemical tests. Determination of free fatty acid | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y46 | | Classification of International Standard | 59.140.30 | | Word Count Estimation | 6,698 | | Date of Issue | 2008-12-30 | | Date of Implementation | 2009-09-01 | | Quoted Standard | GB/T 601; GB/T 6682; GB/T 2706; GB/T 2707; GB/T 2716; GB/T 2718 | | Drafting Organization | National Leather Quality Supervision and Inspection Center (Zhejiang) | | Administrative Organization | China Leather Industry Standardization Technical Committee | | Regulation (derived from) | National Standard Approval Announcement 2008 No.26 (Total No.139) | | Proposing organization | China Light Industry Federation | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies the leather, determination hair free fatty acid content Phi plate method. This standard applies to all kinds of leather, fur. |
GB/T 22933-2022
ICS 59.140.30
CCSY46
National Standards of People's Republic of China
Replacing GB/T 22933-2008
Determination of free fatty acids in chemical tests of leather and fur
Posted on 2022-12-30
2023-07-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
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 for Standardization Documents"
drafting.
This document replaces GB/T 22933-2008 "Determination of Free Fatty Acid in Chemical Tests of Leather and Fur", and GB/T 22933-
Compared with.2008, except for structural adjustment and editorial changes, the main technical changes are as follows.
--- Deleted references to "GB/T 601" and "QB/T 2707", added "QB/T 1267" and "QB/T 1272"
References to "QB/T 1273", "QB/T 1276" and "QB/T 2717" (see Chapter 2, Chapter 2 of the.2008 edition);
--- Added "terms and definitions" (see Chapter 3);
--- Added the expression of carbon tetrachloride extraction of fur in "principle" (see Chapter 4);
--- It is clear that the concentration of ethanol is the volume fraction (see 5.3);
--- Changed the concentration of sodium hydroxide standard solution (see 5.4, 4.3 of the.2008 edition);
---Change "water bath" to oven, and change the temperature range requirements (see 6.2, 5.2 of the.2008 edition);
--- Added the sampling procedure for fur (see 7.1);
---Deleted the provisions on air conditioning of the sample (see 6.3 of the.2008 edition);
--- Added requirements for symmetrical sample mass deviation (see 8.1);
--- Changed the drying method of the extraction bottle (see 8.1, 7.2 of the.2008 edition);
--- Increased the arbitration provisions for the extraction method of leather samples (see 8.1);
--- Added the extraction operation of the fur sample (see 8.1);
---Changed the processing method of "when the color of the extract is darker" (see 8.2, 7.5 of the.2008 edition);
--- The calculation result was changed to the absolute dry mass of the sample, and the calculation formula was changed (see 9.1, Chapter 8 of the.2008 edition);
--- Changed the content of the test report (see Chapter 10, Chapter 10 of the.2008 edition).
This document is modified to adopt ISO 4048.2018 "Leather Chemical Tests Determination of Dichloromethane Extract and Free Fatty Acid Content".
Compared with ISO 4048.2018, this document has a lot of structural adjustments. Appendix A shows the differences between this document and ISO 4048.2018
A list of chapter numbers.
Compared with ISO 4048.2018, this document has many technical differences. Appendix B gives a list of corresponding technical differences and their reasons.
The following editorial changes have been made to this document.
---The name of the standard was changed to "Determination of Free Fatty Acids in Chemical Tests of Leather and Fur";
--- Deleted the informative Appendix B.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China National Light Industry Council.
This document is under the jurisdiction of the National Leather Industry Standardization Technical Committee (SAC/TC252).
This document was drafted by. Shaanxi University of Science and Technology, Guangdong Meizhi Fashion Leather Co., Ltd., Zhejiang Shenghui Chemical Co., Ltd., Liming Vocational University
Xue, Jihua 3514 Leather and Shoes Co., Ltd., Qihe Lihou Chemical Co., Ltd., Zhejiang Tongtianxing Group Co., Ltd., Inner Mongolia Autonomous Region
District Product Quality Inspection Research Institute, Zhongqing Inspection and Certification Co., Ltd., China Leather and Shoes Research Institute Co., Ltd., Jiaxing College.
The main drafters of this document. Qiang Taotao, Na Risu, Lu Mingxu, Zhu Zhiqiang, Duan Xianyong, Liu Hongan, Feng Lianxiang, Hong Wenqing, Ma Hewei,
Liu Zheng, Bu Qiaoqiao, Song Huifang, Duan Qingyun.
The release status of previous versions of this document and the documents it replaces are as follows.
---It was first published as GB/T 22933-2008 in.2008;
--- This is the first revision.
Determination of free fatty acids in chemical tests of leather and fur
Warning. Diethyl ether is flammable and explosive, and relevant operating specifications should be followed when using it.
1 Scope
This document describes a method for the determination of free fatty acid content in leather and fur skin panels.
This document applies to the determination of free fatty acid content in various types of leather and fur skin panels.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
GB/T 6682 Analytical laboratory water specifications and test methods (GB/T 6682-2008, ISO 3696.1987, MOD)
GB/T 39364 Sampling locations for chemical, physical, mechanical and color fastness tests of leather (GB/T 39364-2020, ISO 2418.
2017, MOD)
QB/T 1267 Fur chemical, physical and mechanical, color fastness test sampling location (QB/T 1267-2012, ISO 2418.
2002, MOD)
QB/T 1272 Preparation of fur chemical test samples (QB/T 1272-2012, ISO 4044.2008, MOD)
QB/T 1273 Determination of volatile matter in fur chemical test (QB/T 1273-2012, ISO 4684.2005, MOD)
QB/T 1276 Determination of carbon tetrachloride extract in chemical test of fur (QB/T 1276-2012, ISO 4048.2008,
MOD)
QB/T 2716 Preparation of leather chemical test samples (QB/T 2716-2018, ISO 4044.2008, MOD)
QB/T 2717 Determination of volatile matter in leather chemical tests (QB/T 2717-2018, ISO 4684.2005, MOD)
QB/T 2718 Determination of dichloromethane extract in leather chemical test (QB/T 2718-2018, ISO 4048.2008,
MOD)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
free fatty acid content freefattyacidcontent
With oleic acid as the reference substance, the content of free fatty acids in the extract is determined through the operating conditions specified in this document.
4 principles
Extract the sample with dichloromethane (extract the fur sample with carbon tetrachloride), dissolve the extract in a mixed solvent of ether-ethanol, and use
Sodium hydroxide solution titration, using phenolphthalein as an indicator to judge the titration end point, according to the amount of sodium hydroxide solution consumed, with oleic acid as a reference,
Calculate the content of free fatty acids.
......
GB/T 22933-2008
Leather and fur. Chemical tests. Determination of free fatty acid
ICS 59.140.30
Y46
National Standards of People's Republic of China
Leather and fur - Chemical tests
Determination of free fatty acids
Posted 2008-12-30
2009-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The reference to the international standard method of Leather Technologists and Chemists Association (IULTCS) standard IUC4.
The standard proposed by China National Light Industry Council.
This standard by the National Leather Industry Standardization Technical Committee (SAC/TC252) centralized.
This standard was drafted. National Leather Quality Supervision and Inspection Center (Zhejiang), Haining peace Chemical Co., Ltd., Tongxiang Xin Nuopi grass
Ltd., Key Laboratory of Chemical Engineering, Ministry of Education, Sichuan University leather.
The main drafters of this standard. single Zhihua, Mahe Wei, Lei Hong Wai, Fanzhao Yun, Dong Ronghua, Wuyuan waves.
Leather and fur - Chemical tests
Determination of free fatty acids
1 Scope
This standard specifies the leather, wool Pippi plate method for the determination of free fatty acids.
This standard applies to all kinds of leather, fur.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
Preparation of GB/T 601 chemical reagent standard titration solution
GB/T 6682 Water Analysis Laboratory specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
QB/T 2706 leather chemical, physical, mechanical and color fastness test sample sites
QB/T 2707 preparation and adjustment leather Physical and mechanical tests of samples
QB/T 2716 Leather - Chemical test sample preparation
Determination of QB/T 2718 Leather - Chemical tests dichloromethane extract
Principle 3
The samples were extracted with dichloromethane, extract with ether - ethanol mixed solvent dissolution, titrated with sodium hydroxide solution using phenolphthalein as
Indicator determine the titration end point. Depending on the amount of consumption of sodium hydroxide solution, calculate the content of free fatty acid (oleic acid as a reference material).
4 Reagents and materials
Unless otherwise specified, the reagents were of analytical grade, third grade water as water GB/T 6682 regulations. The criteria used in the experiment drops
Fixed solution, did not indicate when additional requirements are prepared GB/T 601 in accordance with the provisions of calibration.
4.1 ether.
4.2 Ethanol, 95%.
4.3 standard sodium hydroxide solution, 0.05mol/L.
4.4 phenolphthalein indicator, 10g/L, (4.2) formulated with 95% ethanol, pH range of 8.2 to 10.0, from colorless to pale red.
4.5 a mixed solvent of diethyl ether (4.1) a mixture of 95% ethanol (4.2) in (1/1 by volume); before use each mixed solvent was added 40mL
0.5mL phenolphthalein (4.4) and treated with sodium hydroxide solution (4.3) accurately titrated to neutral (showing reddish).
5. Apparatus
5.1 Analytical balance with an accuracy of 0.1mg.
5.2 water bath, can control the temperature of 90 ℃ ~ 95 ℃.
5.3 Basic Buret, 25mL, the smallest scale 0.05mL.
5.4 magnetic stirrer.
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