Pesticides biologically derived

Compounds detected with our TD/GC/MS technique are designated with an X in the next-to-last column of each table. Compounds that we had analyzed by EPA Methods 8081A (pesticides) and 8082 (PCBs) are designated with a Y in the tables. Whenever possible, we also provide CAS numbers for reported compounds. CAS numbers proved difficult to obtain or have not yet been assigned to some of the biologically derived chemicals (i.e. recently discovered semiochemicals and botanicals in propolis). 

Extremely sensitive analytical methods have been developed for the detection of heptachlor and heptachlor epoxide in various environmental and biological samples (detection limits as low as 10 ng/L). Although most methods were developed for detecting heptachlor and heptachlor epoxide in environmental media, the technology is readily adaptable to biological materials including breast milk, adipose tissue, and serum. These methods can be used to determine whether exposure has occurred. The presence of heptachlor may reflect an exposure to heptachlor or chlordane because it is a metabolite of chlordane. The presence of heptachlor epoxide may reflect an exposure to heptachlor or to chlordane since it is a metabolite of both these pesticides. However, in the absence of stable chlordane residues (e.g., nonachlor and oxychlordane), the heptachlor epoxide would most likely have been derived from heptachlor. 

Reference has already been made in this article to pyrazines with antibacterial, antituberculous, antidepressant, diuretic, pesticidal, and herbicidal activity. A review further illustrates the wide range of biological activities of pyrazine derivatives.432... 

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