Pesticide Baygon

Gourtney KD, Andrews JE, Springer J, et al Teratogenic evaluation of the pesticides Baygon, Garbofuran, Dimethoate, and EPN.7 Environ Sci Health B 20(4) 373-406, 1985... 

The reagent sequence is specific for endosulfan and phosphamidon. Other insecticides, e.g. organochlorine insecticides, such as endrin, aldrin, dieldrin, DDT and BHC, organophosphorus insecticides, such as malathion, parathion, dimethoate, quinalphos, phorate and fenitrothion, or carbamate insecticides, such as baygon, car-baryl and carbofuran do not react. Neither is there interference from amino acids, peptides or proteins which might be extracted from the biological material together with the pesticides. 

The first field test was successful. Both dimethoate and malathion declined exponentially (Figure 9) and exhibited efficiency factors comparable to the efficiency factors found in the pilot tests. An efficiency factor could be calculated for baygon, but not for diazinon. Some sediment was present into the bottom of the holding tank which could have been slowly releasing baygon and diazinon in the bulk liquid. Nevertheless, after 24 hours of treatment, all pesticides were below the limit of detection. 

Vasudev V and Krishnamurthy NB. 1994. In vivo cytogenetic analyses of the carbamate pesticides Dithane M-45 and Baygon in mice. Mutat Res 323 133-135. 

Usable FT-spectra of 0.1 mg of Baygon in 0.5 ml CDCI3 were obtained after 2,750 pulsed scans (46 minutes)—the same number of scans using CW-NMR at 250 and 500 seconds per scan would have taken 8 or 16 days, respectively. At this sensitivity, weak sample peaks can be observed, but often peaks from impiuities in the solvent are magnified also, and they may obscure some of these sample peaks. Accumulation of the same number of pulsed scans on a solvent blank and modification of the computer program to subtract this background from the sample data would eliminate this problem. More scans and use of a microcell should enable one to obtain spectra on 0.01 mg of sample or less. This enhanced sensitivity should do more to widen the use of NMR for pesticide residue analysis than any other innovation in NMR spectroscopy. Perhaps even GC-FT-NMR will become a reality in the future. 

The contributions of Mary M. Walker, Frank R. Allen, Ronald G. Webb, and Afred D. Thruston, Jr., colleagues in the National Water Contaminants Characterization Research Program at the Southeast Water Laboratory, are appreciated. The authors also express their thanks to the suppliers of pesticide standards used in this research and to Varian Associates for the FT-NMR spectra of Baygon. (Use of trade names does not imply endorsement by the Environmental Protection Agency or the Southeast Water Laboratory.)... 

Carbaryl, bendiocarb, caibofiiran, baygon, ziram, zineb, and aldicarb were separated on silica gel G layers impregnated with 1% zinc acetate. Zinc sulfate, cadmium acetate, and manganese acetate were studied as impregnants, but the best resolution was observed on the above-mentioned zinc acetate-containing support. 11/values are summarized in Table 4. The detection of these pesticides was carried out by cesium sulfate in 60% sulfuric acid solution (67). 

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