title: Analysis of nonylphenol and nonylphenol ethoxylates in environmental samples by mixed-mode high-performance liquid chromatography-electrospray mass spectrometry.
abstract: A new method is described based on mixed-mode high-performance liquid chromatography with electrospray mass spectrometry detection for comprehensive quantitative analysis of nonylphenol (NP) and nonylphenol ethoxylates (NPEOs) in wastewater and sediment. Efficient separation, reduced band broadening, and high sensitivity were achieved by employing a methanol-water gradient on a mixed-solvent gel filtration column designed for MS interfacing. Quantitative accuracy and precision of the method were improved by the use of custom-synthesized [13C6]NPEO analogs as isotope-dilution surrogate standards. Method detection limits for NP and individual NPEOs ranged from I to 55 pg injected on column.
authors.affiliation: Marine Sciences Research Center, State University of New York, Stony Brook, 11794-5000, USA.
authors.forename: P L
authors.initials: PL
authors.lastname: Ferguson
authors.forename: C R
authors.initials: CR
authors.lastname: Iden
authors.forename: B J
authors.initials: BJ
authors.lastname: Brownawel
mesh_terms: D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis*; D010636:Phenols / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D004785:Environmental Pollutants; D010636:Phenols; C025256:nonylphenol