RAPID BIOASSAY AS INDICATOR OF POTENTIALLY HARMFUL EFFECTS FOR DIOXIN-LIKE COMPOUNDS IN SAMPLE OF YA-ER LAKE, CHINA - REQUIREMENTS FOR CLEANUP AND COMPARISON TO CHEMICAL-ANALYSIS

A rapid bioassay was established measuring the extracts of wildlife sa mples which were taken from Ya-Er Lake area, China. In extracts of the se samples containing PCDD/Fs and PCBs, bioassay and chemically derive d TCDD-equivalents (TEQs) were nearly identical. Our results indicate this bioassay is an excellent complement to chemical residue analysis and a useful tool in understanding the complex interactions of halogen ated hydrocarbons. However, it must be mentioned that the proper prior clean-up method is very important for using the bioassay.