Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6309100 | Chemosphere | 2014 | 9 Pages |
Abstract
A modified version of the QuEChERS method has been evaluated for the determination of 21 pharmaceuticals and 6 personal care products (PPCPs) in drinking-water sludge samples by employing ultra high liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The performance of the method was evaluated through linearity, recovery, precision (intra-day), method detection and quantification limits (MDL and MQL) and matrix effect. The calibration curves prepared in acetonitrile and in the matrix extract showed a correlation coefficient ranging from 0.98 to 0.99. MQLs values were on the ng gâ1 order of magnitude for most compounds. Recoveries between 50% and 93% were reached with RSDs lower than 10% for most compounds. Matrix effect was almost absent with values lower than 16% for 93% of the compounds. By coupling a quick and simple extraction called QuEChERS with the UPLC-MS/MS analysis, a method that is both selective and sensitive was obtained. This methodology was successfully applied to real samples and caffeine and benzophenone-3 were detected in ng gâ1 levels.
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Environmental Chemistry
Authors
Maristela B.R. Cerqueira, Juliana R. Guilherme, Sergiane S. Caldas, Manoel L. Martins, Renato Zanella, Ednei G. Primel,