Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Improved Silica Gel Cleanup Method for Organophosphorus Pesticides.
Author Lores, E. M. ; Moore, J. C. ; Moody, P. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL. ;Computer Sciences Corp., Gulf Breeze, FL.
Year Published 1987
Report Number EPA/600/J-87/144 ;CONTRIB-571;
Stock Number PB88-149018
Additional Subjects Silical gel ; Phosphorus organic compounds ; Adsorbents ; Reprints ; Pesticide residues
Library Call Number Additional Info Location Last
NTIS  PB88-149018 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 8p
Quantitative recovery of some organophosphorus pesticide residues has not been possible with existing silica gel-cleanup procedures. The authors have developed a modification that permits quantitative recovery of all organophosphorus pesticides tested, except those with a carbamate functional group. The method uses a 3.5 g silica gel column with a 1% acetic acid wash to condition the column prior to the addition of the sample. Percentage recovery and standard deviation of compounds such as phorate and disulfoton are 96 (5.6) and 98 (1.0), respectively. Recoveries range from 92 to 101% for the 11 compounds tested.