A novel magnetic β-cyclodextrin modified graphene oxide adsorbent with high recognition capability for 5 plant growth regulators. (15th January 2018)

• Record Type: Journal Article
• Authors: Chen, Jiu-Yan; Cao, Shu-Rui; Xi, Cun-Xian; Chen, Yu; Li, Xian-Liang; Zhang, Lei; Wang, Guo-Min; Chen, Ya-Ling; Chen, Zhi-Qiong
• Is Part Of: Food chemistry. Volume 239(2018)
• Page Start: 911
• Page End: 919
• Publication Date: 2018-01-15
• Subjects: β-Cyclodextrin -- Magnetic graphene oxide -- Magnetic solid phase extraction -- Plant growth regulators; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2017.07.013
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: β-Cyclodextrin modified magnetic graphene oxide (Fe3 O4 @SiO2 /GO/β-CD) was synthesized. Fe3 O4 @SiO2 /GO/β-CD was successfully used as MSPE adsorbent for 5 plant growth regulators extraction. Fe3 O4 @SiO2 /GO/β-CD showed better selectivity than Fe3 O4 @SiO2 /GO. Abstract: β-Cyclodextrin (β-CD) modified magnetic graphene oxide material (Fe3 O4 @SiO2 /GO/β-CD), a novel magnetic sorbent for enrichment and purification of plant growth regulators (PGRs) in vegetables prior to gas chromatograph mass spectrometer (GC–MS) detection, was successfully fabricated. The novel magnetic sorbent geometrically fitted to selectively recognize and enrich PGR analytes especially containing aromatic structure. The selectivity experiment demonstrated the higher selectivity of Fe3 O4 @SiO2 /GO/β-CD toward 5 PGR compounds than that of Fe3 O4 @SiO2 /GO. Several parameters affecting extraction efficiency including the volume of extraction solvent, amount of adsorbent, extraction time, type and the volume of desorption solvent were optimized. Under the optimized condition, good linear relationships were obtained in the range of 1–100 μg/kg with determination coefficients (R 2 ) from 0.9983 to 0.9996. The limits of detection (LODs) of 5 PGRs were from 0.04 to 0.28 μg/kg. The proposed method had good potential for the analysis of trace level of 5 PGRs in real vegetable samples.