Enhanced extraction of organophosphorus pesticides from fruit juices using magnetic effervescent tablets composed of the NiFe₂O₄@SiO₂@PANI-IL nanocomposites

Abstract

The reported ionic liquid (IL)-based magnetic effervescent tablets are a result of direct addition of ILs and magnetic nanoparticles (MNPs).

Ionic-liquid-based effervescence-enhanced magnetic solid-phase extraction for organophosphorus pesticide detection in water samples

“…Here, the powder was compressed into a magnetic effervescent tablet using a tablet press machine at 0.4 MPa for 10 s. The resulting tablets were stored in a sealed bag in a desiccator or immediately utilized for the ILE-MSPE procedures. Also, based on the previous study of our research group and the pre-experimental results of this work, 22,32 the stability of the effervescent tablets could be maintained well within about 6 months.…”

“…Our research group successfully applied ionic liquid ([BMIM]Br)-based magnetic effervescent tablets (NiFe 2 O 4 @SiO 2 @PANI) in reaction-enhanced microextraction to determine OPPs in fruit juices, which provided low limits of detection (0.06-0.17 mg L À1 ). 22 With the distinct advantage of superparamagnetism, MNPs can be easily isolated from the sample solution under an external magnetic eld without residual magnetism. 23 Moreover, MNPs will also retrieve ILs in the pretreatment procedure and decrease the collection time of extraction solvent, 24 which is considered the most timeconsuming step in the IL-DLLME technique.…”

Trace-level detection of sulfonamide antibiotics using quaternary ammonium polymeric ionic liquid-based effervescence-enhanced dispersive solid-phase extraction followed by LC-DAD analysis in environmental waters

“…The reusability of PILs is an important indicator for improving the application potential of solidified ILs. 37 We analyzed the reusability of the P[VBTHEA]Cl adsorbent by regenerating with three washing cycles of ethanol and water, and subsequent drying for use in another effervescent-tablet preparation and extraction cycle. As a result, the as-fabricated effervescent tablets could be reused for at least four cycles with average ER losses of < 11.8% ( Fig.…”

Magnetic solid‐phase extraction of organophosphorus pesticides from apple juice and environmental water samples using magnetic graphene oxide coated with poly(2‐aminoterephthalic acid‐co‐aniline) nanocomposite as a sorbent

“…Contrastingly, at volumes higher than 0.6 mL, the extraction recovery is reduced due to the loss of a large amount of eluent collected after washing. So, 0.6 mL was considered the optimum volume [27]. Desorption time was selected in the range of 1-5 min under vortexing conditions.…”