@misc{indiciae6ece74ec75fb,
  title = {Solid-phase extraction procedures in systematic toxicological analysis.},
  author = {J P Franke and R A de Zeeuw},
  year = {1998},
  doi = {10.1016/s0378-4347(97)00536-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/9700552/},
  note = {Source identifier: 9700552}
}