title: On-line solid-phase extraction-ion-pair liquid chromatography-electrospray mass spectrometry for the trace determination of naphthalene monosulphonates in water.
abstract: This paper presents an HPLC-MS method for the fully automated determination of a group of naphthalene monosulphonates in environmental water samples. The analytical procedure consisted of on-line ion-pair solid-phase extraction using a PLRP-S precolumn and ion-pair LC separation with triethylamine as ion-pair reagent in both cases. A mass spectrometric detector, coupled to LC through an electrospray interface and operated in negative ion mode, was used. Diagnostic ions usually corresponded to [SO3]- and/or [M-SO2H]- together with [M-H] and/or [M-2H+Na]-. The method was applied to the trace determination of several sulphonates present in tap water, seawater and water from the Ebro river. The analytes were determined at a concentration level between 0.05 and 1 microg l(-1) under selected ion monitoring acquisition by preconcentrating just 15 ml of sample. Naphthalene-1-sulphonate and naphthalene-2-sulphonate were identified and quantified in one of the samples of seawater.
authors.affiliation: Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Imperial Tarraco, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Pocurull
authors.forename: C
authors.initials: C
authors.lastname: Aguilar
authors.forename: M C
authors.initials: MC
authors.lastname: Alonso
authors.forename: D
authors.initials: D
authors.lastname: Barceló
authors.forename: F
authors.initials: F
authors.lastname: Borrull
authors.forename: R M
authors.initials: RM
authors.lastname: Marcé
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D013058:Mass Spectrometry / Q000379:methods*; D009281:Naphthalenes / Q000737:chemistry*; D013451:Sulfonic Acids / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D009281:Naphthalenes; D013451:Sulfonic Acids; D014874:Water Pollutants, Chemical; C031721:naphthalene