2015 Volume 2 Issue 4

[email protected] nanocomposite reinforced hollow fiber-solid phase microextraction for preconcentration and determination of organophosphate pesticide in Environmental samples


Diyanoosh Mardanbeigia, Mahmoud Ebrahimi
Abstract

Hollow fiber-solid phase micro-extraction (HF-SPME) technique containing derived Fe3O4/ graphene nanocomposite as a novel high efficiency sorbent, coupled with gas chromatography was used to extraction and determination of three organophosphate pesticides; diazinon, fenitrothion and aqueous samples. First, magnetite nanoparticles (Fe3O4-NPs) were synthesized by chemicalco-precipitation of Fe(II) and Fe(III) ions (where the ratio of Fe(III) to Fe(II) is 2:1, surface of Fe3O4-NPs were modified with graphene (GO/MNPs). In this method, organophosphate pesticides were extracted by the synthesized nanocomposite and analytes by gas chromatography. Experimental parameters related to microextraction such as type of extraction time, organic solvent and agitation rate have been investigated and optimized. The extraction method has been validated for several types of real samples, and no matrix effect was observed. The technique requires minimal sample handling and solvent consumption. Using optimum conditions, low detection limits (0.00011–0.00016 μgL−1) and good linearity (R2 > 0.96) were obtained. Repeatability ranged from 3.11 to 4.91%. Finally the obtained results indicated that the method can be successfully applied for microextraction and determination of pesticides in environmental samples.

Keywords: HF-SPME, organophosphate pesticide, Fe3O4


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Entomology and Applied Science Letters is an international peer reviewed publication which publishes scientific research & review articles related to insects that contain information of interest to a wider audience, e.g. papers bearing on the theoretical, genetic, agricultural, medical and biodiversity issues. Emphasis is also placed on the selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance. Papers on non-insect groups are no longer accepted. In addition to full-length research articles and reviews, the journal publishes interpretive articles in a Forum section, Short Communications, and Letters to the Editor. The journal publishes reports on all phases of medical entomology and medical acarology, including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance.
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