André, C Construction and evaluation of a humic acid column: implication for pesticide risk assessment. [electronic resource] - Analytical chemistry Jul 2005 - 4201-6 p. digital Publication Type: Journal Article ISSN: 0003-2700 Standard No.: 10.1021/ac050005k doi Subjects--Topical Terms: Herbicides--chemistryHumic Substances--analysisMolecular StructureRisk AssessmentRodenticides--chemistry