Journal Highlight: Exploiting green sorbents in rotating‐disk sorptive extraction for the determination of parabens by HPLC tandem electrospray ionization triple quadrupole MS
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- Published: Sep 24, 2018
- Author: separationsNOW
- Channels: Sample Preparation
Journal of Separation Science (Article in Press)
Camila M. S. Vieira, Melaine Mazurkievicz, Angela Maria Lopez Calvo, Vítor Debatin, Gustavo Amadeu Micke, Pablo Richter, Milton Rosero‐Moreano, Eduardo Carasek da Rocha
Abstract: In this study, the viability of applying cork and montmorillonite clay modified with ionic liquid as biosorbents in the rotating‐disk sorptive extraction technique was investigated. Specifically, this was aimed at the determination of methyl paraben, ethyl paraben, propyl paraben and isobutyl paraben, with separation/determination by high‐performance liquid chromatography coupled with mass spectrometry. The optimization of the method for both biosorbents was performed using multivariate procedures. The extraction efficiencies for the target compounds in aqueous matrices were compared to those obtained using the commercial sorbent Octadecil Silano‐C18. The optimum extraction conditions for both natural sorbents were the use of an ammonia solution (pH 10) as the desorption solvent and an extraction time of 30 min. The proposed methods show limits of quantification of 0.8 μg L−1 for cork, 3.0 μg L−1 for montmorillonite clay and 6.0 μg L−1 for Octadecil Silano‐C18. The relative recoveries from river water and tap water samples ranged from 80.3 to 118.7% and 80.0 to 119.9% for cork and montmorillonite clay modified with ionic liquid, respectively. Relative standard deviations intraday and interday of < 15% and < 19% for cork and < 19% and < 17% for montmorillonite clay modified with ionic liquid were obtained.
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