Preferential reductive dechlorination

An alternative confirmatory test for endrin in the presence of dieldrin has been achieved by preferential reductive dechlorination. Although both endrin and dieldrin react with CrCb, endrin is substantially more labile (Figure 4) to this particular reagent to give a pentachloroketone which has a different retention time from the more common organochlorine pesticides (40). 

Competitive Substrate Utilization. Various experiments with phenanthrene mineralization demonstrated partial inhibition with nonionic surfactants at doses less than that resulting in micellization. Such data suggest an alternative explanation for inhibition, other than surfactant effects on cell membranes and proteins. Possibly PAH-degrading microorganisms, or their competitors, utilize the surfactant as preferential substrate or carbon source. Jalvert et al. (66) made a similar conclusion about the effect of C12E4 on reductive dechlorination of hexachlorobenzene. 

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