GB/T 22500-2024 English PDFUS$264.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 22500-2024: Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction Status: Valid GB/T 22500: Historical versions
Basic dataStandard ID: GB/T 22500-2024 (GB/T22500-2024)Description (Translated English): Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: X14 Classification of International Standard: 67.200.10 Word Count Estimation: 13,169 Date of Issue: 2024-10-26 Date of Implementation: 2025-05-01 Older Standard (superseded by this standard): GB/T 22500-2008 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 22500-2024: Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT22500-2024 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction Determination of UV absorbance of animal and vegetable oils and fats Animal and vegetable fats and oils-Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656.2011, IDT) ICS 67.200.10 CCS X 14 National Standard of the People's Republic of China Replaces GB/T 22500-2008 Released on October 26, 2024 Implementation on May 1, 2025 State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface Ⅲ 1 Scope... 1 2 Normative references... 1 3 Terms and Definitions 1 4 Principles... 1 5 Reagents and Materials 1 6 Instruments and Equipment... 2 7 Sampling... 3 8 Sample preparation... 3 9 Analysis Steps... 3 9.1 Test solution preparation 3 9.2 Determination 3 10 Results... 3 10.1 Specific extinction coefficient of a sample at a specific wavelength 3 10.2 Changes in specific extinction coefficient 3 11 Precision... 4 11.1 Interlaboratory testing 4 11.2 Repeatability 4 11.3 Reproducibility 4 12 Test Report... 4 Appendix A (Informative) Statistical results of inter-laboratory comparison tests 5 References... 8 Preface 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 is required. This document replaces GB/T 22500-2008 “Animal and vegetable fats and oils—Determination of ultraviolet absorbance” and is consistent with GB/T 22500-2008. In addition to structural adjustments and editorial changes, the main technical changes are as follows. Changed the principles (see Chapter 4, Chapter 3 of the.2008 edition);- Reagents and materials have been changed (see 5.2, 5.3, 5.4, Chapter 4 of the.2008 edition); - Changed instruments and equipment (see 6.2, Chapter 5 of the.2008 edition); - The preparation of the test solution has been changed (see 9.1.2, 9.1.3, 9.1.4, 8.1 of the.2008 edition); - The result calculation formula has been changed (see 10.1, 10.2, Chapter 9 of the.2008 edition). This document is equivalent to ISO 3656.2011 "Animal and vegetable fats and oils - Determination of ultraviolet absorbance". The following minimal editorial changes have been made to this document. Incorporates the amendments to ISO 3656.2011/Amd.1.2017, and the outer margins of the clauses involved are indicated by vertical Double lines (‖) are marked; The relevant formulas are numbered. - Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was submitted by the State Administration of Grain and Material Reserves. This document is under the jurisdiction of the National Technical Committee on Standardization of Cereals and Oils (SAC/TC 270). This document was drafted by. National Grain and Material Reserves Administration Scientific Research Institute, National Grain and Material Reserves Administration Standards and Quality Center, Yunnan Dianxue Cereals and Oils Co., Ltd., Shandong Jinsheng Cereals and Oils Food Co., Ltd., Feixian COFCO Oils and Fats Industry Co., Ltd., COFCO Engineering (Xi'an) International Engineering Co., Ltd., Pony Testing Group Co., Ltd., Zhangjiagang Customs Comprehensive Technology Center, Shaanxi Keyi Sunshine Testing Technology Service Co., Ltd. Co., Ltd., Shandong Xiangchi Grain and Oil Co., Ltd., Changshouhua Food Co., Ltd., Guomao Food Science Research Institute Co., Ltd., COFCO Nutrition Health Research Institute Co., Ltd., Rizhao Quality Inspection and Testing Institute. The main drafters of this document are. Duan Zhangqun, Yang Qian, Yuan Qiang, Xue Yalin, Liu Andi, Lu Yuan, Liu Peilian, Zhang Xiaoyong, Han Jianxun, Gu Qiang, Hou Guofeng, Zhang Shanshan, Wang Yuehua, Chen Xiuhong, Wang Xiangyu, and Miao Hui. The previous versions of this document and the documents it replaces are as follows. First published in.2008 as GB/T 22500-2008; This is the first revision. Determination of UV absorbance of animal and vegetable oils and fats1 ScopeThis document describes a method for the determination of the UV absorbance of animal and vegetable oils and fats. This document applies to animal and vegetable fats and oils and does not apply to milk and milk products (or fats obtained from milk and milk products).2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the latest version (including all amendments) applies to this document. In this document. ISO 661 Animal and vegetable fats and oils - Preparation of test specimens sample Note. GB/T 15687-2008 Animal and vegetable fats and oils - Preparation of test specimens (ISO 661.2003, IDT) 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 Specific extinction coefficient (K232-K268-K270) 1 g of sample was dissolved in 100 mL of isooctane or cyclohexane and measured at 232 nm, 268 nm and 270 nm in a 10 mm cuvette. UV absorbance under.4 PrinciplesThe sample is dissolved in isooctane or cyclohexane and the absorbance is measured spectrophotometrically within a specific UV wavelength range. 10 mm cuvette, measure the sample solution with a concentration of 1 g/100 mL at 232 nm and 268 nm (when the solvent is isooctane) or Absorbance values at 232 nm and 270 nm (when the solvent is cyclohexane). 5 Reagents and Materials Warning - Please follow the regulations for handling hazardous chemicals. Be careful when using potassium dichromate solution. Inhalation of potassium dichromate solution may cause Potassium dichromate and potassium chromate are CMR substances (carcinogenic, mutagenic, highly toxic), so care should be taken to avoid contact with skin. or inhaled. Unless otherwise stated, all reagents used were of analytical grade. 5.1 Isooctane (2,2,4-trimethylpentane). For measurements at wavelengths of 232 nm and 268 nm. 5.2 Cyclohexane. For measurements at wavelengths of 232 nm and 270 nm. Note. Using distilled water as the reference solution and a 10 mm cuvette, the absorbance at 232 nm must be less than 0.12, and the absorbance at 250 nm must be less than 0.05. 5.3 Potassium dichromate. 5.4 Perchloric acid. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 22500-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 22500-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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