Polyetherimide Nanofibres as Sorbents for Organochlorinated Pesticides Determination

Abstract

Electrospun polyetherimide (PEI) nanofibres were fixed on a steel wire solid phase microextraction (SPME) assembly. The basic properties of the prepared nanofibres were determined by thermogravimetry, differential scanning calorimetry, adsorption, and SEM. The analytical performance of prepared PEI SPME fibres was compared with three commercially available SPME fibres, 7 μm PDMS, 100 μm PDMS, and DVB/Carboxene/PDMS. As model water pollutants, persistent organochlorinated pesticides hexachlorocyclohexanes (HCH) and chlorobenzene (ClB) were chosen as model water pollutants. The fibres were compared in the headspace- (HS-) SPME mode of GC-MS/MS instrumentation. The comparison omitted other method parameters and focused exclusively on the extraction time variability. Lab-made PEI SPME fibres showed significantly better response for the target compounds than the other tested fibres from industrial production. Based on the results, the extraction time could be shortened from 50 to 10 min, if PEI SPME fibres were used as a modification of existing analytical protocol.

Facile synthesis of carbon supported ternary nickel-cobalt-iron nanocatalyst for the hydrodechlorination of 2-chlorophenol

“…Recent developments have seen chlorophenols (CPs) extensively used in the production of herbicides, fungicides, pesticides, insecticides, pharmaceuticals, and dyes [1][2][3] . Beyond these applications, CPs serve as preservative agents in the chemical industry for wood, paints, vegetable fibers, and leather, capitalizing on their potent antimicrobial properties [4][5][6] . Despite their utility, the adverse effects of CPs, including toxicity, carcinogenicity, teratogenicity, and mutagenicity 1,2,7 , cannot be overlooked.…”

Production and characterization of polyetherimide mats by an electrospinning process

“…Given the industrial and scientific importance of this polymer, studies have been reported, to our knowledge, for at least 13 years, especially concerning the use of PEI to produce fibers and mats by electrospinning [6][7][8][9][10][11][12][13][14]. For instance, Han et al [6] evaluated the thermal stability of electrospun mats formed by poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/PEI blends.…”

“…The PVA matrix, after being swelled with electrolyte solution, provided ion size (OH versus Zn OH 4 2-( ) ) dependent conductive pathways being this composite suitable for rechargeable zinc-air batteries. Vojtĕch et al [9] evaluated the electrospun polyetherimide (PEI) nanofibres in application as sorbents for organochlorinated pesticides (hexachlorocyclohexanes and chlorobenzene). The gas chromatography/mass spectroscopy (GCMS/MS) analyses showed better performance of electrospun PEI nanofibres than three commercial SPME fibers for representatives of organochlorinated pesticides.…”