Environmental Protection Agency column selection

The remainder of the modified parfait column consisted of an MSC-1 cation-exchange and an A-162 anion-exchange bed. The elution conditions for these beds were modified to minimize contamination of eluates and to selectively desorb organic anions and cations. With the modified protocol, 20 model compounds (Table I), selected by the U.S. Environmental Protection Agency (USEPA) Health Effects Research Laboratory (HERL), were used to evaluate the recovery efficiency of the method. Recoveries were determined in the presence of 2 ppm of a humic acid supplied by HERL. [Pg.491]

Price, E.K. Prakash, B. Domino, M.M. Pepich, B.V. Munch, D.J. 2005, Determination of selected pesticides and flame retardants in drinking water by solid phase extraction and capillary column gas chromatography/mass spectrometry U.S. Environmental Protection Agency Report EPA/815/R-05/005, Version 1.0. [Pg.489]