Home Cart Quotation About-Us
www.ChineseStandard.net
SEARCH

GB/T 22933-2022 English PDF

Q: How long will the true-PDF of English version of GB/T 22933-2022 be delivered?

Upon your order, we will start to translate GB/T 22933-2022_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.

Q: Can I share the purchased PDF of GB/T 22933-2022_English with my colleagues?

Yes. The purchased PDF of GB/T 22933-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Q: Does the price include tax/VAT?

Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries). Avoidance of Double Taxation Agreements (DTAs) between Singapore and 100+ Countries: https://www.iras.gov.sg/taxes/international-tax

Q: Do you accept my currency other than USD?

Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Q: Should I purchase the latest version GB/T 22933-2022?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 22933-2022 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.

US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 22933-2022: Leather and fur - Chemical tests - Determination of free fatty acid
Status: Valid

GB/T 22933: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22933-2022	199	Add to Cart	3 days	Leather and fur - Chemical tests - Determination of free fatty acid	Valid
GB/T 22933-2008	239	Add to Cart	3 days	Leather and fur -- Chemical tests -- Determination of free fatty acid	Obsolete

Similar standards

GB/T 22890.1 GB/T 22889 GB/T 22930.1

Basic data

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: 10,114
Date of Issue: 2022-12-30
Date of Implementation: 2023-07-01
Older Standard (superseded by this standard): GB/T 22933-2008
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 22933-2022: Leather and fur - Chemical tests - Determination of free fatty acid

---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.
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. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 22933-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 22933-2022_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 22933-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 22933-2022_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. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 22933-2022?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 22933-2022 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.