EVALUATION OF MIXTURE TOXICITY FOR NITROBENZENE AND TRINITROBENZENE AT VARIOUS EQUITOXIC CONCENTRATIONS USING THE VIBRIO-HARVEYI BIOLUMINESCENCE TOXICITY TEST

This study evaluated toxicity of two chemicals, nitrobenzene and trini trobenzene, in various percentage equitoxic mixtures using a marine ba cterium, Vibrio harveyi, as the test organism. Toxicity was evaluated using the bioluminescent properties of this bacterium. End point measu rement was a numerical value which was determined by an additive index procedure. Data from this study suggest that as concentration of the mixture decreases toxicity to the test organism also becomes less. Use of toxicity data at high concentrations, which are above that observe d during pollution events, may provide misleading information on inter actions.