Detection of Nitrofuran Metabolites in Shrimp APPARATUS 1. Adjustable pipettors (Eppendorf) 2. Balance (AND HM-202) 3. Balance (Mettler PM 4800) 4. Water bath with shaker with a homemade platform (New Brunswick Scientific, Innova 3100) 5. Centrifuge (SORVALL, RC 5C Plus) 6. pH meter (ORION model 401 Aplus) 7. Vortex mixer (Vortex-Genie 2 mixer) 8. Solid phase extraction manifolder 24 port (Supelco/Sigma-Aldrich) 9. Evaporator: TurboVap with a 15 ml test tube rack (Zymark, Hopkinton, MA) 10. Disposable 50 ml centrifuge tubes (VWR, 21008-240) 11. Disposable 20 ml reservoirs (part No.12131011, Varian) 12. Disposable frits (part No.12131023, Varian) 13. Disposable 15 ml tube (part No. 3131-340, LabCon) 14. Disposable 3 ml syringe (part No. 309595, B.D.) 15. Disposable 2 m syringe filter (GelmanLab, No. 2003-09) 16. 1.8 ml autosampler vial (Finnigan, No. A4954-010)