TY - RPRT TI - Detection of poly(ethylene glycol) residues from nonionic surfactants in surface water by1h and13c nuclear magnetic resonance spectrometry AU - J.A. Leenheer AU - R.L. Wershaw AU - P.A. Brown AU - T.I. Noyes PY - 2002 DO - 10.1021/es00013a019 UR - https://pubs.usgs.gov/publication/70015610 ID - 70015610 ER -