@misc{indiciae2d45533212a1, title = {Solid-phase extraction for the screening of acidic, neutral and basic drugs in plasma using a single-column procedure on Bond Elut Certify.}, author = {X H Chen and J Wijsbeek and J van Veen and J P Franke and R A de Zeeuw}, year = {1990}, doi = {10.1016/s0378-4347(00)83817-7}, url = {https://pubmed.ncbi.nlm.nih.gov/2170433/}, note = {Source identifier: 2170433} }