RING TEST PROGRAMME 1983 - 1984. ASSESSMENT OF BIODEGRADABILITY OF CHEMICALS IN WATER BY MANOMETRIC RESPIROMETRY
This ring test programme was carried out by 26 participants accustomed to the technique of respirometry; hence the results may be accepted with confidence. The EEC manometric respirometric method, similar to the MITI I test, was found suitable for reliably assessing ready biodegradability. Fourteen chemicals, reported to behave erratically in some way or other in respirometric tests, were assessed by between 9 and 25 participants. Aniline, used as the control substance, behaved as expected on over 97% of occasions. The importance of allowing for nitrification in calculating the % ThOD of nitrogen-containing test substances is stressed. It is also concluded that changes in the concentration of ammonia and oxidised nitrogen should be determined, even with test substances not containing nitrogen. The effects of nitrification may be lessened by using less ammonium chloride in the medium.
Bibliographic Reference: EUR 9962 EN (1985) MF, 103 P., BFR 300, BLOW-UP COPY BFR 515, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123111300 / Last updated on: 1987-01-01
Available languages: en