G. Junk, J. Richard
Mar 1, 1988
Citations
1
Influential Citations
207
Citations
Quality indicators
Journal
Analytical Chemistry
Abstract
Octadecyl (C-18) bonded to porous silica has been evaluated for the solid-phase extraction (SPE) of organic compounds from water. Excellent performance was deduced from average recovery of > 85% for pesticides and polycyclic organic materials present in contrived water samples at 1-10 ng/mL. Extraction results showed effective performance of the SPE when 1-100 mL of water was passed through small columns containing 40-100 mg of 40-..mu..m C-18 bonded porous silica at flow rates as high as 250 bed volumes/min. The adsorbed compounds were removed by collecting 60-100 ..mu..L of either ethyl acetate or benzene eluate. The unique feature of this research is the combination of small water volumes, fast flow rates, small columns, and small eluate volumes that obviate solvent removals prior to GC analysis, while still retaining all the other advantageous features of SPE. Excellent performance was also confirmed in tests of environmental waters where the results based on SPE agreed with those based on accepted classical extractions.