https://www.usgs.gov/publications/a-comparison-surface-water-natural-organic-matter-raw-filtered-water-samples-xad-and
This research compared raw filtered waters (RFWs), XAD resin isolates (XAD-8 and XAD-4), and reverse osmosis (RO) isolates of several surface water samples...
natural organic mattersurface watercomparisonraw