title: Application of an optimized dispersive nanomaterial ultrasound-assisted microextraction method for preconcentration of carbofuran and propoxur and their determination by high-performance liquid chromatography with UV detection.
abstract: An extraction method based on dispersive nanomaterial ultrasound-assisted microextraction was used for the preconcentration of carbofuran and propoxur insecticides in water samples prior to high-performance liquid chromatography with UV detection. ZnS:Ni nanoparticles were synthesized based on the reaction of the mixture of zinc acetate and nickel acetate with thioacetamide in aqueous media and then loaded on activated carbon (ZnS:Ni-AC). Different methods were used for recognizing the properties of ZnS:Ni-AC and then this nanomaterial was used for extraction of carbamate insecticide as new adsorbent. The influence of variables on the extraction method (such as amount of adsorbent (mg: NiZnS-AC), pH and ionic strength of sample solution, vortex and ultrasonic time (min), ultrasound temperature and desorption volume (mL) was investigated by a screening 2(7-4) Plackett-Burman design. Then the significant variables were optimized by using a central composite design combined with a desirability function. At optimum conditions, this method had linear response >0.0060-10 μg/mL with detection limit 0.0015 μg/mL and relative standard deviations <5.0% (n = 3).
authors.affiliation: Medicinal plants Research Center, Yasuj University of Medical Science, Yasuj, Iran.
authors.forename: Saeid
authors.initials: S
authors.lastname: Khodadoust
authors.forename: Mohammad Sharif
authors.initials: MS
authors.lastname: Talebianpoor
authors.forename: Mehrorang
authors.initials: M
authors.lastname: Ghaedi
mesh_terms: D000327:Adsorption; D002235:Carbofuran / Q000032:analysis / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D007306:Insecticides / Q000032:analysis / Q000302:isolation & purification*; D059627:Liquid Phase Microextraction / Q000295:instrumentation / Q000379:methods*; D049329:Nanostructures / Q000737:chemistry; D009994:Osmolar Concentration; D001074:Propoxur / Q000032:analysis / Q000302:isolation & purification*; D013010:Sonication; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*
chemical_list: D007306:Insecticides; D014874:Water Pollutants, Chemical; D001074:Propoxur; D002235:Carbofuran
keywords: Central composite design; Dispersive nanomaterial ultrasound-assisted microextraction; High-performance liquid chromatography; Insecticides; Plackett-Burman design