Extraction of carboxin and bensulfuron-methyl using cysteine-functionalized chitosan-coated magnetic nanoparticles and response surface methodology

• Published in: Separation science and technology Vol. 56; no. 14; pp. 2385 - 2397
• Main Authors: Kouhestani, Hossein, Ebrahimi, Pouneh
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 22.09.2021; Taylor & Francis Ltd
• Subjects: Abbreviations; Adsorbents; Bensulfuron-methyl; Box-Behnken design; Carboxin; Chitosan; Cysteine; Deionization; Design; dispersive solid-phase extraction; Distilled water; Fourier transforms; Gravimetric analysis; Liquid-liquid extraction; magnetic nanoparticles; Nanoparticles; Recovery; Response surface methodology; Solid phases; Solvent extraction; Tetraethyl orthosilicate; Water analysis; Water sampling; X-ray diffraction
• ISSN: 0149-6395; 1520-5754
• DOI: 10.1080/01496395.2020.1828923

In the proposed method cysteine-functionalized chitosan-coated magnetic nanoparticles were synthesized and used as an effective adsorbent for the extraction of carboxin and bensulfuron-methyl. The experiments were performed according to an orthogonal rotatable Box-Behnken design. The results showed that the limits of detection, quantification values, and linear ranges were 0.6, 2.0 µg.L −1 , and 2-1000 µgL −1 for carboxin, and 0.3, 1.0 µgL −1 , and 1-1000 µgL −1 for bensulfuron-methyl. The proposed method was applied to spiked real samples. The percentage of recovery values (91.53%-98.46%) with low relative standard deviation (≤4.6%) demonstrated excellent repeatability and applicability of this adsorbent to water samples. Abbreviations: Aminopropyl triethoxysilane, APTES; Box-Behnken design, BBD; Central composite design, CCD; Chitosan, CS; Double-distilled deionized water, DDW; Extraction recovery, ER; Fourier transform infrared, FT-IR; Liquid-Liquid extraction, LLE; Liquid-Solid extraction, LSE; Maximum residue limits, MRL; Magnetic dispersive-solid-phase extraction, MD-SPE; Magnetic nanoparticles, MNPs; Multiple linear regression, MLR; Response surface methodology, RSM; Solid-phase extraction, SPE; Thermal gravimetric analyses, TGA; Tetraethyl orthosilicate, TEOS; X-ray diffraction, XRD.