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GB/T 44707-2024: Chemicals - Enhanced ready biodegradability test
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Chemicals - Enhanced ready biodegradability test
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Standard similar to GB/T 44707-2024 GB 45835 | GB/T 42368 | GB/T 41854 | GB/T 44708 | GB/T 44706 | Basic data | Standard ID | GB/T 44707-2024 (GB/T44707-2024) | | Description (Translated English) | Chemicals - Enhanced ready biodegradability test | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A80 | | Classification of International Standard | 13.300 | | Word Count Estimation | 12,199 | | Date of Issue | 2024-10-26 | | Date of Implementation | 2025-05-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 44707-2024: Chemicals - Enhanced ready biodegradability test---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/GBT44707-2024
Chemicals - Enhanced ready biodegradability test
Enhanced Ready Biodegradability Test for Chemicals
ICS 13.300
CCS A 80
National Standard of the People's Republic of China
Released on October 26, 2024
Implementation on May 1, 2025
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface Ⅲ
Introduction Ⅳ
1 Scope... 1
2 Normative references... 1
3 Terms and Definitions 1
4 Method Overview... 2
4.1 Principle 2
4.2 Method Selection 2
5 Test substance information... 2
6 Reference substances... 3
7 Experimental Preparation... 3
7.1 Instruments and Equipment 3
7.2 Test water and culture medium 3
7.3 Inoculum 3
8 Test Procedure... 4
8.1 Strengthening Conditions 4
8.2 Addition of test substance 4
8.3 Test Operation 4
9 Quality Assurance and Quality Control... 4
10 Data... 5
11 Results Report... 5
References 6
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 is consistent with GB/T 27850 "General principles for the rapid biodegradability of chemicals" and GB/T 21801 "General principles for the rapid biodegradability of chemicals".
GB/T 21802 "Modified MITI test for the ready biodegradability of chemicals (I)", GB/T 21803
"Ready biodegradability of chemicals. DOC reduction test", GB/T 21831 "Ready biodegradability of chemicals. Closed bottle test"
GB/T 21856 “Test for Carbon Dioxide Generation of Ready Biodegradable Chemicals” and GB/T 21857 “Test for Rapid Biodegradability of Chemicals
It should be used in conjunction with the OECD screening test for improved biodegradability.
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 is proposed and coordinated by the National Technical Committee for Standardization of Hazardous Chemicals Management (SAC/TC 251).
This document was drafted by. Institute of Microbiology, Guangdong Academy of Sciences (Guangdong Microbiological Analysis and Testing Center), Solid Waste Management Department of the Ministry of Ecology and Environment
Chemical and Material Management Technology Center, China Inspection and Quarantine (Tianjin) Inspection and Testing Co., Ltd., Lubrizol Management (Shanghai) Co., Ltd.,
Shanghai Testing Center, Nanjing Institute of Environmental Sciences of the Ministry of Ecology and Environment, Shanghai Institute of Chemical Technology Testing Co., Ltd., Shenyang Shenyang Institute of Chemical Technology Testing Technology Co., Ltd.
Co., Ltd., China National Accreditation Service for Conformity Assessment, Wanhua Chemical Group Co., Ltd., FUCHS Lubricants (China) Co., Ltd.,
Special Technology Co., Ltd.
The main drafters of this document are. Xu Meiying, Mei Chengfang, Wu Xiaohuai, Deng Guirong, Liu Chunxin, Zeng Guoqu, Luo Fengjuan, Zhou Lili,
Teng Xiaoming, Xing Weilong, Shu Yaogao, Rong Zhiyi, Ye Zhijun, Yang Xuefei, Zhou Binbin, Sun Shuai, and Qiao Jiancheng.
introduction
When a compound does not show rapid biodegradability in a rapid biodegradability test, further screening is required.
Degradation tests, such as enhanced rapid biodegradability tests and inherent biodegradability tests, are recommended to identify potential persistence.
The enhanced ready biodegradability test is used to assess persistence, which provides a wider range of method choices and more comprehensive optimization conditions.
This document is incompatible with the general rules for ready biodegradability (GB/T 27850) and any of the test methods for ready biodegradability (GB/T 21801,
GB/T 21802, GB/T 21803, GB/T 21831, GB/T 21856, GB/T 21857 and OECD Chemical Testing Guidelines
No.310) and use the selected rapid biodegradability test standard as the basic method by
In addition to the contents described in this document, other test contents and requirements can be found in the selected method standards.
When using this document to conduct tests using pre-exposure inocula or increasing inoculum concentrations and using the data obtained for regulatory purposes, consideration should be given to the trial
Whether the test results are sufficient and valid.
Enhanced Ready Biodegradability Test for Chemicals
1 Scope
This document describes the method overview, test substance information, reference substances, test preparation, test
Procedures, quality assurance and quality control, data, reporting of results.
This document applies to enhanced ready biodegradability testing of chemicals.
2 Normative references
The 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.
GB/T 21801 Respirometric test for the rapid biodegradability of chemicals
GB/T 21802 Modified MITI test for the ready biodegradability of chemicals (I)
GB/T 21803 DOC reduction test for the rapid biodegradability of chemicals
GB/T 21831 Ready biodegradability of chemicals. Closed bottle test
GB/T 21856 Carbon dioxide generation test for readily biodegradable chemicals
GB/T 21857 Improved OECD screening test for the ready biodegradability of chemicals
GB/T 27850 General rules for the ready biodegradability of chemicals
OECD Chemical Testing Guidelines No. 310 Ready Biodegradability ﹘ Closed Bottle Carbon Dioxide Method (Headspace Test) [Ready Biodegrad
ability﹘CO2 in sealed vessels (Headspace Test)]
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
biodegradability
The biodegradability of the test compound after contact with the inoculum.
3.2
ready biodegradability
The biodegradability of a test compound after exposure to an inoculum for a defined period of time.
3.3
persistence
The ability of the test compound to remain unchanged in the environment or its tendency not to decompose or transform in the environment.
Note. The assessment is usually based on the half-life and/or biodegradation rate of the test substance in the environmental medium.
3.4
Preconditioning
In the absence of the test compound, the inoculum was incubated with aeration under the test conditions.
Note. Improve the test quality by reducing the inoculum blank value and enhancing the adaptability of microorganisms to test conditions.
3.5
Pre-exposure
Inocula are pre-incubated under test conditions in the presence of the test compound.
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