Determination of Rhodamine B in Food Samples by Fe3O4@ Ionic Liquids-β-Cyclodextrin Cross Linked Polymer Solid Phase Extraction Coupled with Fluorescence Spectrophotometry

Abstract

FeO@Ionic liquids β-cyclodextrin polymer(FeO@ mono-6- deoxy-6- (1-ethyl- imidazolium)-β-cyclodextrin iodide polymer, ILs-β-CDCP) was prepared. A novel method based on FeO@ILs-β-CDCP solid phase extraction coupled with fluorescence spectrophotometry for Rhodamine B (RhB) determination, was investigated. Results were shown that RhB was adsorbed on FeO@ILs-β-CDCP and eluted with sodium dodecyl sulfate (SDS) (1.0%) rapidly. Different parameters, such as pH, adsorption time and volume, eluent volume and time were studied. This method introduced linearity for RhB between 0.01-9.00 μg/mL , the limit of detection was 5.2 ng/mL , correlation coefficient (R) was >0.9987 and the relative standard deviation (RSD) was 3.1% (n = 3, c = 4.00 μg/mL). The mechanism of adsorption of RhB on FeO@ILs-β-CDCP was studied through the FTIR analysis and the inclusion constant of FeO@ILs-β-CDCP-RhB. This method was applied successfully for determination of RhB in real samples with satisfactory results.

Highly Conductive Yarn Cathode Coated with Polypyrrole as a Flexible Battery for Wearables

“…In doing so, the CFs were simply twisted to increase the retention between CFs. Subsequent in situ polymerization of Py on ice, laminated surface black CFPP yarn was prepared, and the sedimentation of PPy granules on PAN fibers contributed to increase the friction between CFs, thus enhancing their mechanical performance. − Based on the aggregation process, it was shown based on the polymerization process that PPy is an electronically conducting polymer, consisting primarily of conjugated aggregates. Its conductive carriers were mostly electrons or holes.…”

On-line separation/analysis of Rhodamine B dye based on a solid-phase extraction high performance liquid chromatography self-designed device

“… 23–27 In our previous publication, Fe 3 O 4 @ionic liquids-β-cyclodextrin cross-linked polymer SPE reported coupled with FL to assay RhB. 28 PILs are easily separated and recovered in SPE, which expands the application of ionic liquids in SPE. This manuscript reports the first application of poly-1-vinyl-3-pentylimidazole hexafluorophosphate (PILs-C 5 ) for the extraction of RhB.…”

Vortex-assisted ionic liquid-based dispersive liquid-liquid micro-extraction and spectrofluorometric determination of Rhodamine B in anti-freeze, lipstick, liquid soap, matches and red pencil core

“…Unfortunately, complex matrix interference and low concentration of RhB limit the direct determination of RhB contents in sample. Therefore, it has great importance to apply at least one or more pretreatment process prior to the determination of trace target analyte RhB in complicated samples (Bakheet and Zhu, 2017).…”