TABLE 1.

Extraction solutions

* all extractions were done in duplicates except where no range is given. Unless specifically stated, extraction agents were dissolved in water and adjusted to pH = 7. After extraction with a given extraction solution, samples were sequentially re-extracted with 5, 25, and 80% methanol (except for those conditions where a specific solvent was tested – ‘Solvents’ conditions). The four extracts were pooled for analysis of recoveries. SA, Specifically Adsorbed; E, Electrostatic Interactions; H, Hydrophobic Interactions. Colors indicate high (> 50%, green), intermediate (10–50%, yellow), low (1–10%, rose), and negligible (<1%, brown) recoveries.