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3062750 
Technical Report 
Continuous analysis of chlorinated hydrocarbon pesticides in the lower Mississippi River 
Brodtmann NV Jr 
1976 
PESTAB/76/1111 
Environ 
1 
33-39; 1976 
PESTAB. A continuous liquid/liquid extraction apparatus was used to monitor ng/liter levels of eight chlorinated hydrocarbon pesticides in the Mississippi River at the Jefferson Parish Waterworks, District No. 1. The sample periods were 7 days each. Of the eight compounds studied (gamma-chlordane, lindane, heptachlor, heptachlor epoxide, dieldrin, endrin, p,p'-DDD (TDE), and p,p'-DDT), the only significant correlation observed was a negative one between the concentrations of heptachlor and heptachlor epoxide. The concentrations of all of the eight pesticides were continuously found in the ng/liter range. A minimum of 49.7 lbs of the eight pesticides (combined weight) was estimated to be introduced to the Gulf of Mexico each day. On an annual basis, this figure equates to a minimum of 9 tons/yr.