A novel testing method determines the amount of organic compounds sorbed to sediments. It is a nonextractive immunoassay which has demonstration data for 2,4-dinitrobenzene sulfonate (a model pollutant for which antibodies are commercially available) sorbed to crushed brick (a model sediment surrogate). the nonextractive immunoassay quantitatively distinguishes between contamination levels. Advantages of the nonextractive immunoassay include small sample size (<1 g), easy adaptation to field testing, and elimination of extraction solvents.