TY  - RPRT
TI  - Application of mixed-mode, solid-phase extraction in environmental and clinical chemistry. Combining hydrogen-bonding, cation-exchange and Van der Waals interactions
AU  - M. S. Mills
AU  - E.M. Thurman
AU  - M.J. Pedersen
PY  - 1993
DO  - 10.1016/0021-9673(93)80349-d
UR  - https://pubs.usgs.gov/publication/70018255
ID  - 70018255
ER  -