GB/T 21796-2022Chemicals - Activated sludge respiration inhibition test (English PDF)
化学品 活性污泥呼吸抑制试验
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Issued by
State Administration for Market Regulation; Standardization Administration of China
Level / Type
National · Recommended
Issue date
July 11, 2022
Implementation date
February 1, 2023
Scope
GB/T 21796-2022 is the English-translated version of 化学品 活性污泥呼吸抑制试验.
GB/T 21796-2022 is the Chinese national standard on chemicals - activated sludge respiration inhibition test, in the field of environment and health protection, safety.
The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up — which in practice is how most foreign buyers meet it.
It was issued on 11 July 2022 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 February 2023.
Classification: ICS 13.300, CCS A80. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there.
The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.
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Document preview — GB/T 21796-2022
National Standard of the People's Republic of China
- ICS
- 13.300
- Classification
- A80
Issued by: State Administration for Market Regulation; Standardization Administration of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Information on the test substance
- 5 Principle of the test
- 6 Reference substance / reference material
- 7 Test methods
- 8 Test procedure
- 9 Quality assurance and quality control
- 10 Data and reporting
- References
3 Terms and definitions
4 Information on the test substance
5 Principle of the test
6 Reference substance / reference material
7 Test methods
8 Test procedure
9 Quality assurance and quality control
10 Data and reporting
Foreword
This document was issued on 11 July 2022 by the State Administration for Market Regulation and the Standardization Administration of the People's Republic of China, and has been in force since 1 February 2023.
It replaces GB/T 21796-2008.
Classification: ICS 13.300, CCS A80.
About this edition
GB/T 21796-2022 is the current edition. It was issued on 11 July 2022 and has been in force since 1 February 2023, replacing GB/T 21796-2008.
GB/T 21796-2008 has been superseded: a specification that still cites it is citing a withdrawn edition.
The interval between issue and effect is the transition period. It exists so that producers, laboratories and buyers can requalify products, revise procedures and use up documentation before the new text becomes the one that applies. The date on this page is the official one from the record of the Standardization Administration.
Classification and status
GB/T 21796-2022 is classified under ICS 13.300, in the field of environment and health protection, safety. ICS is the International Classification for Standards, the same scheme used by ISO and by the national bodies of most countries, which is what allows a Chinese standard to be placed beside its foreign counterparts on subject rather than on number.
Its Chinese Standard Classification code is CCS A80. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.
The GB/T prefix marks a recommended national standard. It is not, in itself, law: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it. In practice that covers most of the cases in which it will be read — a purchase specification, an inspection agreement or a certification scheme.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 13 pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 21818-2025Chemicals — Inherent biodegradability — Modified MITI test (II)
- GB/T 46136-2025Chemicals — Determining anaerobic transformation test in liquid manure
- GB/T 42992.1-2023Chemicals—Simulation tests to assess the biodegradability of chemicals discharged in wastewater—General considerations
- GB/T 36700.4-2018Chemicals—Guidance on hazard classification to the aquatic environment—Part 4: Degradation
Similar standards
Editions of GB/T 21796
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 21796-2022 | Chemicals - Activated sludge respiration inhibition test | current edition | Current |
| GB/T 21796-2008 | Testing of chemicals - Activated sludge respiration inhibition test | previous edition | Superseded |
This page sells the current edition, GB/T 21796-2022. Earlier editions are listed for reference only.
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