TY - RPRT TI - Solid-phase extraction for the screening of acidic, neutral and basic drugs in plasma using a single-column procedure on Bond Elut Certify. AU - X H Chen AU - J Wijsbeek AU - J van Veen AU - J P Franke AU - R A de Zeeuw PY - 1990 DO - 10.1016/s0378-4347(00)83817-7 UR - https://pubmed.ncbi.nlm.nih.gov/2170433/ ID - 2170433 ER -