Health & Environmental Research Online (HERO)


Print Feedback Export to File
3061006 
Journal Article 
Persistence and metabolism of TDE in California Clear Lake fish 
Cairns, T; Parfitt, CH 
1980 
Yes 
Bulletin of Environmental Contamination and Toxicology
ISSN: 0007-4861
EISSN: 1432-0800 
PESTAB/80/1564 
24 
4 
504-510 
English 
7378597 
PESTAB. Data is presented on the persistence and metabolism of TDE in 12 fish collected in 1967 from Clear Lake in California. Clear Lake, a naturally occurring shallow lake, was treated with TDE in 1949, 1954, and 1957 (a total of over 5.4 x 74 kg of TDE) to control gnats. Composits were prepared from the edible portion of the fish, including the skin. Head, tail, bones, scales and viscera were discarded. Samples were extracted, then examined by electron capture gas chromatography. The presence of the parent compound was clearly demonstrated. One European carp sample contained 6.0 ppm p,p'-TDE and 2.06 ppm o,p'-TDE. The TDE metabolites DDMS, DDNU, and DDNS were also found in some samples. It is concluded that the high levels of TDE found in carp samples are further evidence that bottom feeding species suffer greater exposure to TDE because of high sediment concentration of the pesticide.