TY  - RPRT
TI  - Solid-phase extraction procedures in systematic toxicological analysis.
AU  - J P Franke
AU  - R A de Zeeuw
PY  - 1998
DO  - 10.1016/s0378-4347(97)00536-7
UR  - https://pubmed.ncbi.nlm.nih.gov/9700552/
ID  - 9700552
ER  -