The Experts below are selected from a list of 216 Experts worldwide ranked by ideXlab platform
Bahram Ebrahimi - One of the best experts on this subject based on the ideXlab platform.
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preparation and binding study of solid phase microextraction fiber on the basis of ametryn imprinted Polymer Application to the selective extraction of persistent triazine herbicides in tap water rice maize and onion
Journal of Chromatography A, 2009Co-Authors: Djavanshir Djozan, Mehrdad Mahkam, Bahram EbrahimiAbstract:Abstract A monolithic ametryn molecular-imprinted Polymer based on a simple Polymerization method was fabricated for use as new solid-phase microextraction (SPME) fiber, which can be coupled with GC and GC/MS for selective extraction and analysis of triazine herbicides. Methacrylic acid (MAA), ethylene glycol dimethacrylate (EDMA) and ametryn bear role of functional monomer, cross-linker and template, respectively. In the optimized conditions the fabricated fiber showed better molecular recognition abilities for methylthiotriazine herbicides than chloro-triazine herbicides. By use of bi-Langmuir isotherm model the evaluated equilibrium constants for ametryn were 0.01 and 890.69 μM −1 , and the numbers of binding sites were 129.98 and 5.82 nmol g −1 , respectively. The high extraction efficiency was obtained for ametryn, prometryn, terbutryn, atrazine, simazine, propazine, and cyanazine, yielding the detection limits of 14, 28, 45, 56, 85, 95 and 74 ng mL −1 , respectively by GC with flame ionization detection. The reliability of the prepared fiber for extraction of ametryn and other analogues in real samples has been investigated and proved by using spiked samples such as tap water, rice, maize, and onion.
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preparation of new solid phase micro extraction fiber on the basis of atrazine molecular imprinted Polymer Application for gc and gc ms screening of triazine herbicides in water rice and onion
Analytica Chimica Acta, 2008Co-Authors: Djavanshir Djozan, Bahram EbrahimiAbstract:Abstract A simple Polymerization strategy has been used to produce a monolithic solid phase micro extraction (SPME) fiber on the basis of molecularly imprinted Polymer able to couple with GC and GC–MS for selective extraction and analysis of triazine herbicides. A fiber was produced by coPolymerization of methacrylic acid–ethylene glycol dimethacrylate imprinted with atrazine. The effective factors influencing the Polymerization have been investigated and are detailed here. At the optimum conditions the prepared fiber is firm, inexpensive, durable and thermally stable up to 280 °C which has vital importance in SPME coupled with GC or GC/MS. In addition, the influences of pH, extraction time and temperature on the extraction efficiency of analytes were optimized. Selectivity of prepared fibers in relation to triazine herbicides and some of the other pesticide has been investigated. The high extraction efficiency was obtained for atrazine, simazine, propazine, cyanazine, ametryn, terbutryn and prometryn yielding the detection limits of 20, 70, 80, 81, 69, 88 and 68 ng mL −1 , respectively and the high quantities of recoveries. The reliability of prepared fiber to extraction of atrazine and other analogues in real samples has been investigated and proved by implementation of SPME in spiked samples such as tap water, onion and rice.
Djavanshir Djozan - One of the best experts on this subject based on the ideXlab platform.
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preparation and binding study of solid phase microextraction fiber on the basis of ametryn imprinted Polymer Application to the selective extraction of persistent triazine herbicides in tap water rice maize and onion
Journal of Chromatography A, 2009Co-Authors: Djavanshir Djozan, Mehrdad Mahkam, Bahram EbrahimiAbstract:Abstract A monolithic ametryn molecular-imprinted Polymer based on a simple Polymerization method was fabricated for use as new solid-phase microextraction (SPME) fiber, which can be coupled with GC and GC/MS for selective extraction and analysis of triazine herbicides. Methacrylic acid (MAA), ethylene glycol dimethacrylate (EDMA) and ametryn bear role of functional monomer, cross-linker and template, respectively. In the optimized conditions the fabricated fiber showed better molecular recognition abilities for methylthiotriazine herbicides than chloro-triazine herbicides. By use of bi-Langmuir isotherm model the evaluated equilibrium constants for ametryn were 0.01 and 890.69 μM −1 , and the numbers of binding sites were 129.98 and 5.82 nmol g −1 , respectively. The high extraction efficiency was obtained for ametryn, prometryn, terbutryn, atrazine, simazine, propazine, and cyanazine, yielding the detection limits of 14, 28, 45, 56, 85, 95 and 74 ng mL −1 , respectively by GC with flame ionization detection. The reliability of the prepared fiber for extraction of ametryn and other analogues in real samples has been investigated and proved by using spiked samples such as tap water, rice, maize, and onion.
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preparation of new solid phase micro extraction fiber on the basis of atrazine molecular imprinted Polymer Application for gc and gc ms screening of triazine herbicides in water rice and onion
Analytica Chimica Acta, 2008Co-Authors: Djavanshir Djozan, Bahram EbrahimiAbstract:Abstract A simple Polymerization strategy has been used to produce a monolithic solid phase micro extraction (SPME) fiber on the basis of molecularly imprinted Polymer able to couple with GC and GC–MS for selective extraction and analysis of triazine herbicides. A fiber was produced by coPolymerization of methacrylic acid–ethylene glycol dimethacrylate imprinted with atrazine. The effective factors influencing the Polymerization have been investigated and are detailed here. At the optimum conditions the prepared fiber is firm, inexpensive, durable and thermally stable up to 280 °C which has vital importance in SPME coupled with GC or GC/MS. In addition, the influences of pH, extraction time and temperature on the extraction efficiency of analytes were optimized. Selectivity of prepared fibers in relation to triazine herbicides and some of the other pesticide has been investigated. The high extraction efficiency was obtained for atrazine, simazine, propazine, cyanazine, ametryn, terbutryn and prometryn yielding the detection limits of 20, 70, 80, 81, 69, 88 and 68 ng mL −1 , respectively and the high quantities of recoveries. The reliability of prepared fiber to extraction of atrazine and other analogues in real samples has been investigated and proved by implementation of SPME in spiked samples such as tap water, onion and rice.
M Ruthiraan - One of the best experts on this subject based on the ideXlab platform.
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synthesis of magnetic biochar from agricultural waste biomass to enhancing route for waste water and Polymer Application a review
Renewable & Sustainable Energy Reviews, 2017Co-Authors: K R Thines, E C Abdullah, N M Mubarak, M RuthiraanAbstract:The development of magnetic biochar from biomass and the prospect of developing magnetic nanomaterials have attracted many researchers worldwide. The conversion of this biomass into something more prospective has reduced the waste management issue without any hassle. Magnetic biochar which is derived from various types of biomass exhibits a good magnetic property with high surface area and significant morphology through various production methods. These magnetic biochar showed a remarkable Application as an adsorbent for various wastewater treatments and were cooperated in certain selected Polymer composites for Application in supercapacitor. This study provides an extensive summary of various production methods of magnetic biochar along with its Application in wastewater treatment and selected Polymer cooperation.
Mehrdad Mahkam - One of the best experts on this subject based on the ideXlab platform.
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preparation and binding study of solid phase microextraction fiber on the basis of ametryn imprinted Polymer Application to the selective extraction of persistent triazine herbicides in tap water rice maize and onion
Journal of Chromatography A, 2009Co-Authors: Djavanshir Djozan, Mehrdad Mahkam, Bahram EbrahimiAbstract:Abstract A monolithic ametryn molecular-imprinted Polymer based on a simple Polymerization method was fabricated for use as new solid-phase microextraction (SPME) fiber, which can be coupled with GC and GC/MS for selective extraction and analysis of triazine herbicides. Methacrylic acid (MAA), ethylene glycol dimethacrylate (EDMA) and ametryn bear role of functional monomer, cross-linker and template, respectively. In the optimized conditions the fabricated fiber showed better molecular recognition abilities for methylthiotriazine herbicides than chloro-triazine herbicides. By use of bi-Langmuir isotherm model the evaluated equilibrium constants for ametryn were 0.01 and 890.69 μM −1 , and the numbers of binding sites were 129.98 and 5.82 nmol g −1 , respectively. The high extraction efficiency was obtained for ametryn, prometryn, terbutryn, atrazine, simazine, propazine, and cyanazine, yielding the detection limits of 14, 28, 45, 56, 85, 95 and 74 ng mL −1 , respectively by GC with flame ionization detection. The reliability of the prepared fiber for extraction of ametryn and other analogues in real samples has been investigated and proved by using spiked samples such as tap water, rice, maize, and onion.
K R Thines - One of the best experts on this subject based on the ideXlab platform.
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synthesis of magnetic biochar from agricultural waste biomass to enhancing route for waste water and Polymer Application a review
Renewable & Sustainable Energy Reviews, 2017Co-Authors: K R Thines, E C Abdullah, N M Mubarak, M RuthiraanAbstract:The development of magnetic biochar from biomass and the prospect of developing magnetic nanomaterials have attracted many researchers worldwide. The conversion of this biomass into something more prospective has reduced the waste management issue without any hassle. Magnetic biochar which is derived from various types of biomass exhibits a good magnetic property with high surface area and significant morphology through various production methods. These magnetic biochar showed a remarkable Application as an adsorbent for various wastewater treatments and were cooperated in certain selected Polymer composites for Application in supercapacitor. This study provides an extensive summary of various production methods of magnetic biochar along with its Application in wastewater treatment and selected Polymer cooperation.