Comparison between two Microtox test procedures.

A comparison between the two Microtox test procedures, the standard test and the 100% test, has been made. In the standard Microtox bioassay, effluents can be tested up to a concentration of 45%. The 100% test method, however, has been developed for screening effluents with an EC50 value greater than 45%.

The use of the bivalve Mytilus edulis as a test organism for bioconcentration studies. II. The bioconcentration of two 14C-labeled chlorinated paraffins.

The bioconcentration of two 14C-labeled chlorinated paraffins (CP) has been studied in a flow-through test system using the common mussel Mytilus edulis. Both CPs showed a rapid uptake rate and the CP with C16 carbon chain and 34% chlorination had a bioconcentration factor (BCF) of about 7000 (fresh weight). The CP with a C12 carbon chain and 69% chlorination had a very high BCF of almost 140,000 which on a lipid weight basis corresponds to a BCF of around 8,000,000.

Comparison of the Microtox test with the 96-hr LC50 test for the harpacticoid Nitocra spinipes.

A comparison between the static 96-hr LC50 test with the brackish water harpacticoid Nitocra spinipes and the Microtox (Beckman Instruments, Inc.) screening method has been done. The relationship between the two bioassays were evaluated for 16 pure and technical chemicals and 11 complex effluents from different types of industries.

The use of the bivalve Mytilus edulis as a test organism for bioconcentration studies. I. Designing a continuous-flow system and its application to some organochlorine compounds.

Most bioconcentration studies have previously been carried out using fish as a test organism. Equally important is the use of bivalves for this purpose, from both an ecological and an economic point of view. A continuous-flow system has thus been designed for use also with extremely hydrophobic substances and evaluated using 2,4',5-trichlorobiphenyl, methoxychlor, pentachlorobenzene, and lindane.