OECD confirmatory test

OECD screening test) (OECD, 1971) OECD confirmatory test (82/243/EQG) Modified OECD confirmatory test (DIN 38412, part 26)... 

Further examinations have been done in the biodegradation ecotoxicity sequence rest (BEST). In this test a realistic diluted effluent of the modified OECD confirmatory test (DIN 38412, part 26) is tested continually on daphnia reproduction over three generations. It can be said that the effluents of an OECD confirmatory plant (feed 10 mg/L LAS), containing nondegraded surfactants and catabolites, have no negative effect on the juvenile and adult daphnia even in the third generation and do not influence their reproduction [296]. 

The primary biodegradation grades of secondary alkanesulfonates measured by different tests are distinctly above 90%. In the OECD Confirmatory Test (sewage treatment plant simulation test), the biodegradability is 99% (decrease in MBAS, the methylene blue active substance). 

The biodegradation of branched-chain alkanol ethoxyethylates was carried out by the standard OECD confirmatory tests and the metabolites fractionated after solid-phase extraction. The structures of the metabolites were determined by electrospray mass spectrometry and this made it possible to derive a scheme for the partial degradation of the compounds (Di Corcia et al. 1998). 

OECD Screening Test (%) OECD Confirmatory Test (%) Screening Tests Coupled Units Test ... 

LC50 for Zebra fish Biodegradability 80% within 28 days (OECD Confirmatory Test). 

The permitted tests are a method approved in France [58], the German method [58] and the OECD method [56]. In cases of doubt, the OECD Confirmatory Test is used as a reference method and, accordingly, is described in detail [58]. 

OECD Confirmatory Test (Activated Sludge Test)... 

Fig. 13. Degradation curves for surfactants of high and low degradability in the OECD Confirmatory Test [54]...

The degrees of degradation of linear Cio- is-alkylbenzenesulfonate determined by very diverse analytical methods, but using the same degradation method (OECD Confirmatory Test) are shown in Table 8. 

May and Neufahrt [81] have reported on the behaviour of the cationic surfactant distearyldimethylammonium chloride (DSDAC) in sludge-activating units. In the OECD Confirmatory Test, they obtained elimination rates of between 91% and 93% at a feed rate of 2.78 mg of DSDAC/1 or 1.75 mg of DSDAC/1, with an... 

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