EN 29408 : 1993

Cooperating organizations
National foreword
Foreword
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Test environment
6 Reagents
7 Apparatus
8 Procedure
9 Calculation and expression of results
10 Validity of the test
11 Test report
Annexes
A (informative) Example of the calculation of the
    theoretical oxygen demand
B (informative) Correction of oxygen uptake for
    interference by nitrification
C (informative) Respirometric test
D (informative) Principle of a closed respirometer
National annexes
NA (informative) Committees responsible
NB (informative) Cross-references

Also numbered BS 6068:Part 5:Sec 5.11 (1993) and ISO 9408. Specifies a method, by determination of the oxygen demand in a closed respirometer, for the evaluation in an aqueous medium of the "ultimate" biodegradability of organic compounds at a given concentration by aerobic micro-organisms. Applies to organic compounds which: are insoluble in the test conditions; do not react and react with CO2 absorbent; are volatile, provided that a suitable respirometer is used; are soluble in the test conditions; are not inhibitory to the test micro-organisms at the concentration chosen for the test. Coverage includes definitions, reagents, procedure and apparatus. Also includes detailed annexes.