Determination of naphthalenesulfonates in water by on-line ion-pair solid-phase extraction and ion-pair liquid chromatography with fast-scanning fluorescence detection.
A fast analytical method for quantifying a mixture of 12 naphthalenesulfonates and naphthalenedisulfonates has been developed. This method consists of on-line ion-pair solid-phase extraction with PLRP-s sorbent and ion-pair liquid-chromatography using fast-scanning fluorescence spectrometer as a detection system and multivariate calibration. As complete separation is unnecessary, the compounds were analysed in isocratic conditions and the chromatographic analysis took only 25 min. Three-way partial least-squares (PLS) was used to carry out multivariate calibration for spiked tap water. In these conditions, quantification limits were between 0.01 and 3 microg x l(-1). Repeatability was also evaluated and relative standard deviations (n=3) were between 0.5 and 4, depending on the compound. Finally, spiked tap and Ebro river waters were analysed to evaluate prediction capability of the method.
Gimeno
R A
RA
Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Tarragona, Spain.
Beltrán
J L
JL
Marcé
R M
RM
Borrull
F
F
D002138:Calibration; D002853:Chromatography, Liquid / Q000379:methods*; D009282:Naphthalenesulfonates / Q000032:analysis*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
D009282:Naphthalenesulfonates; D014874:Water Pollutants, Chemical