Figure 3From: Influence of different flow conditions on the occurrence and behavior of potentially hazardous organic xenobiotics in the influent and effluent of a municipal sewage treatment plant in Germany: an effect-directed approachSequential solid phase extraction procedure. Scheme of the SSPE procedure used in the present study (with DCM, dichlormethane; EA, ethyl acetate; MeOH, methanol; FA, formic acid; NH3, ammonia).Back to article page