Abstract
A magnetic Fe3O4/reduced graphene oxide composite was synthesized by a one-step chemical coprecipitation method and characterized by different methods. The synthesized magnetic composite was used as magnetic sorbent in dispersive solid phase extraction process for preconcentration of 4-tert octylphenol and atrazine. The experimental variables in dispersive solid phase extraction were optimized based on two strategies: one-factor-at-a-time for mixing type and buffer pH; Box Behnken design for sorbent amount, mixing period, eluent volume and buffer volume. Analysis of variance study for proposed model resulted to high determination coefficient (R2) of 0.957 and adjusted-R2 of 0.929 indicating a good adjustment of regression model with observed values. Under the optimum extraction conditions, the determination of analytes was carried out by a gas chromatography–mass spectrometry system. The limits of detection and quantification values under the optimum conditions were found to be 1.23 and 4.10 ng mL−1 for 4-tert octylphenol and 6.81 and 22.71 ng mL−1 for atrazine, respectively. The low relative standard deviation (≤ 6.2%) indicated good repeatability and satisfactory percent recovery values (96.3–112.6%) demonstrated the applicability of proposed method to tap water, river water and waste water samples.
Original language | English |
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Pages (from-to) | 423-428 |
Number of pages | 6 |
Journal | Microchemical Journal |
Volume | 146 |
DOIs | |
Publication status | Published - May 2019 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2019 Elsevier B.V.
Keywords
- Endocrine distributors
- Gas chromatography
- Magnetic nanoparticles
- Pesticides
- Preconcentration