Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 10/20/1998
Publication Date: N/A
Technical Abstract: Lysimeters have traditionally been made out of stainless steel and teflon to monitor soil solutions and ground water. The possibility of adsorption of organic chemicals to polyvinyl chloride (PVC) lysimeters, a more economical alternative to stainless steel, has led to debate over their suitability for ground water sampling. The adsorption of different classes of pesticides, alachlor, atrazine, imidacloprid, isophenfos, nicosulfuron, and triadimefon, on a lysimeter constructed from rigid PVC was determined to evaluate the suitability of PVC material for use in groundwater sampling. Isophenfos demonstrated slight adsorption to the material on the inside of the lysimeter; adsorption was rapid and isophenfos was not easily desorbed with methanol and water. None of the other pesticides adsorbed to the lysimeter. When selecting a lysimeter, potential adsorptive interactions between the pesticide and the materials used in the lysimeter construction should be evaluated.