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Basic data
| Standard ID | GB/T 21803-2008 (GB/T21803-2008) |
| Description (Translated English) | Chemicals -- Ready biodegradability -- DOC die-away test |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | A80 |
| Classification of International Standard | 13.300; 13.020.40 |
| Word Count Estimation | 12,165 |
| Date of Issue | 2008-05-12 |
| Date of Implementation | 2008-09-01 |
| Adopted Standard | OECD No.301A-1992, IDT |
| Regulation (derived from) | Announcement of Newly Approved National Standards No. 7 of 2008 (No. 120 overall) |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China |
| Summary | This standard specifies the chemical biodegradability test methods outlined DOC reduction, test preparation, test procedures, quality assurance and quality control, data and reports. This standard applies to test non- volatile, water solubility of not less than 100 mg/L of chemicals rapid biodegradability. |
GB/T 21803-2008: Chemicals -- Ready biodegradability -- DOC die-away test
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Chemicals.Ready biodegradability .DOC die-away test
ICS 13.300; 13.020.40
A80
National Standards of People's Republic of China
Fast biodegradability of chemicals
DOC reduction test
Posted.2008-05-12
2008-09-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard is identical with the Organization for Economic Co-operation and Development (OECD) Chemicals Test Guide No. 301A (1992) "DOC reduction test
Test "(in English).
This standard made the following editorial changes.
--- The unit of measurement will be changed to the legal unit of measurement in our country.
This standard Appendix A, Appendix B and Appendix C are informative appendix.
This standard by the National Standardization Technical Committee of hazardous chemicals management (SAC/TC251) and focal point.
This standard is drafted by. Ministry of Environmental Protection Chemical Registration Center.
Participated in the drafting of this standard. Environmental Science Nanjing Environmental Science Institute, Shanghai Testing Center, Shanghai Institute of Environmental Sciences.
The main drafters of this standard. Sun Jinye, Liu Chunxin, Hu Zheng, Liu Jining, single Zhengjun, Chen Xiaoqian, Shen Genxiang.
Fast biodegradability of chemicals
DOC reduction test
1 Scope
This standard specifies the chemical fast biodegradable DOC reduction test method overview, test preparation, test procedures, quality assurance
With quality control, data and reporting.
This standard applies to the test non-volatile, water solubility of not less than 100mg/L fast biodegradability of chemicals.
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
The biodegradability of the test substance in contact with the inoculum within a defined period of time.
2.2
The biological activity of the test substance changes in the chemical structure of the process of loss of characteristics.
2.3
The content of organic carbon in the solution, often refers to the organic carbon content in the liquid filtered through a 0.45 μm membrane filter, or by 4000r/min speed
The content of organic carbon in the supernatant after centrifugation for 15 minutes.
2.4
The test began until the degradation rate of 10% of the period.
2.5
10d biodegradation rate of 10% after the test time.
2.6
The period from the end of stasis until the degradation rate reached 90% of the maximum degradation rate.
3 subject information
a) Molecular formula and structural formula;
b) water solubility;
c) vapor pressure;
d) carbon content;
e) Purity;
f) the composition of the main components;
g) Adsorption;
h) Microbial toxicity.
...
