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A novel graphene nanosheets coated stainless steel fiber for microwave assisted headspace solid phase microextraction of organochlorine pesticides in aqueous samples followed by gas chromatography with electron capture detection.
J Chromatogr A. 2011 Sep 28; 1218(39):6861-8.JC

Abstract

In this study, a novel graphene nanosheets (GNSs) coated solid phase microextraction (SPME) fiber was prepared by immobilizing microwave synthesized GNSs on a stainless steel wire. Microwave synthesized GNSs were verified by X-ray diffraction, field emission-scanning electron microscopy (FE-SEM) and transmission electron microscope (TEM). GNS-SPME fiber was characterized using FE-SEM and the results showed the GNS coating was homogeneous, porous, and highly adherent to the surface of the stainless steel fiber. The performance and feasibility of the GNS-SPME fiber was evaluated under one-step microwave assisted (MA) headspace (HS) SPME followed by gas chromatography with electron capture detection for five organochlorine pesticides (OCPs) in aqueous samples. Parameters influencing the extraction efficiency of MA-HS-GNS-SPME such as microwave irradiation power and time, pH, ionic strength, and desorption conditions were thoroughly examined. Under the optimized conditions, detection limits for the OCPs varied between 0.16 and 0.93 ng L(-1) and linear ranges varied between 1 and 1500 n gL(-1), with correlation coefficients ranging from 0.9984 to 0.9998, and RSDs in the range of 3.6-15.8% (n=5). In comparison with the commercial 100 μm polydimethylsiloxane fiber, the GNS coated fiber showed better extraction efficiency, higher mechanical and thermal stability (up to 290°C), longer life span (over 250 times), and lower production cost. The method was successfully applied to the analysis of real water samples with recoveries ranged between 80.1 and 101.1% for river water samples. The results demonstrated that the developed MA-HS-GNS-SPME method was a simple, rapid, efficient pretreatment and environmentally friendly procedure for the analysis of OCPs in aqueous samples.

Authors+Show Affiliations

Department of Chemistry, National Chung-Hsing University, Taichung 402, Taiwan.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21872868

Citation

Ponnusamy, Vinoth Kumar, and Jen-Fon Jen. "A Novel Graphene Nanosheets Coated Stainless Steel Fiber for Microwave Assisted Headspace Solid Phase Microextraction of Organochlorine Pesticides in Aqueous Samples Followed By Gas Chromatography With Electron Capture Detection." Journal of Chromatography. A, vol. 1218, no. 39, 2011, pp. 6861-8.
Ponnusamy VK, Jen JF. A novel graphene nanosheets coated stainless steel fiber for microwave assisted headspace solid phase microextraction of organochlorine pesticides in aqueous samples followed by gas chromatography with electron capture detection. J Chromatogr A. 2011;1218(39):6861-8.
Ponnusamy, V. K., & Jen, J. F. (2011). A novel graphene nanosheets coated stainless steel fiber for microwave assisted headspace solid phase microextraction of organochlorine pesticides in aqueous samples followed by gas chromatography with electron capture detection. Journal of Chromatography. A, 1218(39), 6861-8. https://doi.org/10.1016/j.chroma.2011.08.019
Ponnusamy VK, Jen JF. A Novel Graphene Nanosheets Coated Stainless Steel Fiber for Microwave Assisted Headspace Solid Phase Microextraction of Organochlorine Pesticides in Aqueous Samples Followed By Gas Chromatography With Electron Capture Detection. J Chromatogr A. 2011 Sep 28;1218(39):6861-8. PubMed PMID: 21872868.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A novel graphene nanosheets coated stainless steel fiber for microwave assisted headspace solid phase microextraction of organochlorine pesticides in aqueous samples followed by gas chromatography with electron capture detection. AU - Ponnusamy,Vinoth Kumar, AU - Jen,Jen-Fon, Y1 - 2011/08/16/ PY - 2011/04/15/received PY - 2011/08/08/revised PY - 2011/08/08/accepted PY - 2011/8/30/entrez PY - 2011/8/30/pubmed PY - 2011/12/13/medline SP - 6861 EP - 8 JF - Journal of chromatography. A JO - J Chromatogr A VL - 1218 IS - 39 N2 - In this study, a novel graphene nanosheets (GNSs) coated solid phase microextraction (SPME) fiber was prepared by immobilizing microwave synthesized GNSs on a stainless steel wire. Microwave synthesized GNSs were verified by X-ray diffraction, field emission-scanning electron microscopy (FE-SEM) and transmission electron microscope (TEM). GNS-SPME fiber was characterized using FE-SEM and the results showed the GNS coating was homogeneous, porous, and highly adherent to the surface of the stainless steel fiber. The performance and feasibility of the GNS-SPME fiber was evaluated under one-step microwave assisted (MA) headspace (HS) SPME followed by gas chromatography with electron capture detection for five organochlorine pesticides (OCPs) in aqueous samples. Parameters influencing the extraction efficiency of MA-HS-GNS-SPME such as microwave irradiation power and time, pH, ionic strength, and desorption conditions were thoroughly examined. Under the optimized conditions, detection limits for the OCPs varied between 0.16 and 0.93 ng L(-1) and linear ranges varied between 1 and 1500 n gL(-1), with correlation coefficients ranging from 0.9984 to 0.9998, and RSDs in the range of 3.6-15.8% (n=5). In comparison with the commercial 100 μm polydimethylsiloxane fiber, the GNS coated fiber showed better extraction efficiency, higher mechanical and thermal stability (up to 290°C), longer life span (over 250 times), and lower production cost. The method was successfully applied to the analysis of real water samples with recoveries ranged between 80.1 and 101.1% for river water samples. The results demonstrated that the developed MA-HS-GNS-SPME method was a simple, rapid, efficient pretreatment and environmentally friendly procedure for the analysis of OCPs in aqueous samples. SN - 1873-3778 UR - https://www.unboundmedicine.com/medline/citation/21872868/A_novel_graphene_nanosheets_coated_stainless_steel_fiber_for_microwave_assisted_headspace_solid_phase_microextraction_of_organochlorine_pesticides_in_aqueous_samples_followed_by_gas_chromatography_with_electron_capture_detection_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9673(11)01184-8 DB - PRIME DP - Unbound Medicine ER -