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GB/T 21831-2008: Testing of chemicals -- Ready biodegradability: Closed bottle test
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21831-2008 | English | 254 |
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Testing of chemicals -- Ready biodegradability: Closed bottle test
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GB/T 21831-2008
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Basic data | Standard ID | GB/T 21831-2008 (GB/T21831-2008) | | Description (Translated English) | Testing of chemicals -- Ready biodegradability: Closed bottle test | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A80 | | Classification of International Standard | 13.300; 13.020.40 | | Word Count Estimation | 13,197 | | Date of Issue | 2008-05-12 | | Date of Implementation | 2008-09-01 | | Adopted Standard | OECD No.301D-1992, IDT | | Regulation (derived from) | Announcement of Newly Approved National Standards 2008 No. 8 (No. 121 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 fast Biodegradability: Closed Bottle method test method overview, test preparation, test procedures, quality assurance and quality control, data and reports. This standard applies to test a water-soluble or water- insoluble, non -volatile, volatile or chemical adsorption rapid biodegradability. | GB/T 21831-2008: Testing of chemicals -- Ready biodegradability: Closed bottle test---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.
Testing of chemicals Ready biodegradability. Closed bottle test
ICS 13.300; 13.020.40
A80
National Standards of People's Republic of China
Chemicals biodegradability.
Closed bottle test
Posted 2008-05-12
2008-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is identical with the Organisation for Economic Co-operation and Development (OECD) guidelines for testing of chemicals No. 301D (1992 Nian) "closed bottle test"
(In English).
This standard made the following editorial changes.
--- The units of measurement to our legal units of measurement.
The Standard Appendix A, Appendix B, Appendix C, Appendix D and Appendix E is an informative annex.
This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points.
This standard is drafted by. Environmental Protection Department of Chemical Registration Center.
Participated in the drafting of this standard. Ministry of Environmental Protection, Nanjing Institute of Environmental Sciences, Shanghai Academy of Environmental Sciences, Shenyang Chemical Research Institute
Safety Evaluation Center.
The main drafters of this standard. Sun Jin industry, the new Liu Chun Hou Lin, Liu Jining, Shi Lili, Shen root Xiang, Yang Hairong.
Chemicals biodegradability.
Closed bottle test
1 Scope
This standard specifies the chemical biodegradability. Closed bottle test method overview, test preparation, test procedures, quality assurance
And quality control, data and reports.
This standard applies to quick biological test water-soluble or poorly water-soluble, non-volatile, or adsorption of volatile chemicals
Degradation.
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
Test substance exhibiting a limited time in contact with the inoculum biodegradability.
2.2
The amount of oxygen consumed by the microbial decomposition of organic matter, can be expressed as the number of milligrams of oxygen (mg/mg) of the test substance consumed per milligram.
2.3
In strong acid and heating conditions, a certain amount of dichromate oxidation of reducing substances in water samples of the amount of oxidant consumed, can be expressed as millimoles per
Oxygen milligrams (mg/mg) g of the test substance consumed.
2.4
Calculated according to the formula of the total amount of the test substance is completely oxidized oxygen required, it can be expressed as oxygen consumption per mg of the test substance in mg
The number of grams (mg/mg).
2.5
Start of the test to the degradation rate of 10% of the period.
2.6
10d test time biodegradation rate of 10% after.
2.7
Standstill period to the end of the degradation rate of 90% of the maximum degradation rate of the period.
3 test substance information
a) the formula;
b) solubility in water;
c) vapor pressure;
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