Biopolymer-imidazolium based dicationic ionic liquid modified clay bionanocomposite coating for solid-phase microextraction of phthalate esters

• Published in: Microchemical journal 2021-11, Vol.170, p.106648, Article 106648
• Main Authors: Erdem, Pelin, Altınışık Tağaç, Aylin, Tashakkori, Paniz, Seyhan Bozkurt, Serap, Merdivan, Melek
• Format: Article
• Language: English
• Subjects: Carboxymethyl cellulose; Clay; Dicationic immidazolium based ionic liquid; Direct immersion solid phase microextraction; Phthalate esters
• ISSN: 0026-265X; 1095-9149
• DOI: 10.1016/j.microc.2021.106648

[Display omitted] •Novel clay-natural biopolmer-dicationic ionic liquid coated SPME fiber was prepared.•The bionanocomposite coating exhibited good extraction efficiency towards PAEs.•The method was used for determination of PAEs in beer, mineral water and lemonade. In this study, biopolymer-ionic liquid modified clay bionanocomposite was used as a coating for solid phase microextraction fiber to improve the analysis of plasticizers. Montmorillonite (MMT) clay intercalated with carboxymethyl cellulose (CMC) and dicationic imidazolium-based ionic liquid (Im-DIL) was coated onto an etched and hydroxyl functionalized stainless steel wire. The prepared MMT/CMC/Im-DIL coated fiber was assessed for the determination of six phthalate esters (PAEs) using direct immersion solid-phase microextraction (DI-SPME) with gas chromatography/mass spectrometer (GC/MS). Compared to MMT, MMT/CMC, MMT/Im-DIL, MMT/CMC/Im-DIL coating displayed much better extraction performance (>nearly 486–20 times). Under optimized conditions, the proposed method performed wide linearity (0.01–400.0 µg L-1), low limit of detection (1.0 ng L-1), satisfactory extraction repeatability (RSD%, ⩽ 3.86) and preparation repeatability (RSD%, ⩽ 5.79). The proposed method was applied successfully for analyzing of PAEs in beer, mineral water and carbonated lemonade drink.