The Experts below are selected from a list of 117192 Experts worldwide ranked by ideXlab platform
Farideh Golbabaei - One of the best experts on this subject based on the ideXlab platform.
-
Molecularly imprinted Solid Phase Extraction for trace analysis of diazinon in drinking water.
Iranian Journal of Environmental Health Science & Engineering, 2009Co-Authors: M. Rahiminejad, Seyed Jamaleddin Shahtaheri, Mohammad Reza Ganjali, A. Rahimi Forushani, Farideh GolbabaeiAbstract:Amongst organophosphate pesticides, the one most widely used and common environmental contaminant is diazinon; thus methods for its trace analysis in environmental samples must be developed. Use of diazinon imprinted polymers such as sorbents in Solid Phase Extraction, is a prominent and novel application area of molecular imprinted polymers. For diazinon Extraction, high performance liquid chromatography analysis was demonstrated in this study. During optimization of the molecular imprinted Solid Phase Extraction procedure for efficient Solid Phase Extraction of diazinon, Plackett-Burman design was conducted. Eight experimental factors with critical influence on molecular imprinted Solid Phase Extraction performance were selected, and 12 different experimental runs based on Plackett-Burman design were carried out. The applicability of diazinon imprinted polymers as the sorbent in Solid Phase Extraction, presented obtained good recoveries of diazinon from LCgrade water. An increase in pH caused an increase in the recovery on molecular imprinted Solid Phase Extraction. From these results, the optimal molecular imprinted Solid Phase Extraction procedure was as follows: Solid Phase Extraction packing with 100 mg diazinon imprinted polymers; conditioning with 5 mL of methanol and 6 mL of LC-grade water; sample loading containing diazinon (pH=10); washing with 1 mL of LC-grade water, 1 mL LCgrade water containing 30% acetonitrile and 0.5 mL of acetonitrile, respectively; eluting with 1 mL of methanol containing 2% acetic acid. The percentage recoveries obtained by the optimized molecular imprinted Solid Phase Extraction were more than 90% with drinking water spiked at different trace levels of diazinon. Generally speaking, the molecular imprinted Solid Phase Extraction procedure and subsequent high performance liquid chromatography analysis can be a relatively fast and proper approach for qualitative and quantitative analysis of diazinon in drinking water.
-
Molecular Imprinted Solid Phase Extraction For Determination OfAtrazine In Environmental Samples
2008Co-Authors: Alireza Koohpaei, S J Shahtaheri, Mohammad Reza Ganjali, A. Rahimi Forushani, Farideh GolbabaeiAbstract:Solid Phase Extraction is one of the major applications of molecularly imprinted polymers fields for clean-up of environmental and biological samples namely molecularly imprinted Solid-Phase Extraction. In this study, Solid Phase Extraction using the imprinted polymer has been optimized with the experimental design approach for a triazine herbicide, named atrazine with regard to the critical factors which influence the molecular imprinted Solid Phase Extraction efficiency such as sample pH, concentration, flow-rate, volume, elution solvent, washing solvent and sorbent mass. Optimization methods that involve changing one factor at a time can be laborious. A novel approach for the optimization of imprinted Solid-Phase Extraction using chemometrics is described. The factors were evaluated statistically and also validated with spiked water samples and showed a good reproducibility over six consecutive days as well as six within-day experiments. Also, in order to the evaluate efficiency of the optimized molecularly imprinted Solid-Phase Extraction protocols, enrichment capacity, reusability and cross-reactivity of cartridges have been also evaluated. Finally, selective molecularly imprinted Solid-Phase Extraction of atrazine was successfully demonstrated with a recovery above 90% for spiked drinking water samples. It was concluded that the chemometrics is frequently employed for analytical method optimization and based on the obtained results, it is believed that the central composite design could prove beneficial for aiding the molecularly imprinted polymer and molecularly imprinted Solid-Phase Extraction development.
Seyed Jamaleddin Shahtaheri - One of the best experts on this subject based on the ideXlab platform.
-
Molecularly imprinted Solid Phase Extraction for trace analysis of diazinon in drinking water.
Iranian Journal of Environmental Health Science & Engineering, 2009Co-Authors: M. Rahiminejad, Seyed Jamaleddin Shahtaheri, Mohammad Reza Ganjali, A. Rahimi Forushani, Farideh GolbabaeiAbstract:Amongst organophosphate pesticides, the one most widely used and common environmental contaminant is diazinon; thus methods for its trace analysis in environmental samples must be developed. Use of diazinon imprinted polymers such as sorbents in Solid Phase Extraction, is a prominent and novel application area of molecular imprinted polymers. For diazinon Extraction, high performance liquid chromatography analysis was demonstrated in this study. During optimization of the molecular imprinted Solid Phase Extraction procedure for efficient Solid Phase Extraction of diazinon, Plackett-Burman design was conducted. Eight experimental factors with critical influence on molecular imprinted Solid Phase Extraction performance were selected, and 12 different experimental runs based on Plackett-Burman design were carried out. The applicability of diazinon imprinted polymers as the sorbent in Solid Phase Extraction, presented obtained good recoveries of diazinon from LCgrade water. An increase in pH caused an increase in the recovery on molecular imprinted Solid Phase Extraction. From these results, the optimal molecular imprinted Solid Phase Extraction procedure was as follows: Solid Phase Extraction packing with 100 mg diazinon imprinted polymers; conditioning with 5 mL of methanol and 6 mL of LC-grade water; sample loading containing diazinon (pH=10); washing with 1 mL of LC-grade water, 1 mL LCgrade water containing 30% acetonitrile and 0.5 mL of acetonitrile, respectively; eluting with 1 mL of methanol containing 2% acetic acid. The percentage recoveries obtained by the optimized molecular imprinted Solid Phase Extraction were more than 90% with drinking water spiked at different trace levels of diazinon. Generally speaking, the molecular imprinted Solid Phase Extraction procedure and subsequent high performance liquid chromatography analysis can be a relatively fast and proper approach for qualitative and quantitative analysis of diazinon in drinking water.
-
development and optimisation of an immunoaffinity based Solid Phase Extraction for chlortoluron
Journal of Chromatography A, 1995Co-Authors: Seyed Jamaleddin Shahtaheri, M.f. Katmeh, P. Kwasowski, D StevensonAbstract:Abstract The determination of trace organics such as pesticides in biological and environmental samples require rapid, easy-to-use, reliable sample preparation procedures. Solid-Phase Extraction using silica or bonded silicas has proven useful for broad-range screening. We have used antisera to chlortoluron immobilised onto silica as a “tailor-made” Solid-Phase Extraction system. The chlortoluron can be selectively retained and eluted using a simple phosphate buffered saline/ethanol mixture. Preliminary studies have demonstrated that the immuno column has a high volume breakthrough (at least 11 of water) and can retain up to 500 ng of chlortoluron. Quantitative recovery from tap water, river water, drinking water, plasma and urine is achieved along with an HPLC trace free from co-eluting compounds at the chlortoluron retention time.
Hong Ying Pei - One of the best experts on this subject based on the ideXlab platform.
-
Recent Developments in Molecularly Imprinted Solid Phase Extraction Technology
Applied Mechanics and Materials, 2014Co-Authors: Gui Jun Shen, Hong Ying PeiAbstract:Describes the preparation of molecularly imprinted Solid Phase Extraction technology, Extraction methods, selectivity and application status.
-
The Application of Molecularly Imprinted Polymers to Solid-Phase Extraction
Advanced Materials Research, 2014Co-Authors: Hong Ying Pei, Gui Jun ShenAbstract:A benefit of imprinted polymers is the possibility to prepare sorbents with selectivity pre-determined for a particular substance, or group of structural analogues. The application most close to a wider acceptance is probably that of Solid Phase Extraction for clean-up of environmental and biological samples. The technique of molecularly imprinted polymers to Solid Phase Extraction (MISPE) is performance and high selectively, compared with traditional sorbents. In this paper, the preparation and application of MIPs would be reviewed.
Gui Jun Shen - One of the best experts on this subject based on the ideXlab platform.
-
Recent Developments in Molecularly Imprinted Solid Phase Extraction Technology
Applied Mechanics and Materials, 2014Co-Authors: Gui Jun Shen, Hong Ying PeiAbstract:Describes the preparation of molecularly imprinted Solid Phase Extraction technology, Extraction methods, selectivity and application status.
-
The Application of Molecularly Imprinted Polymers to Solid-Phase Extraction
Advanced Materials Research, 2014Co-Authors: Hong Ying Pei, Gui Jun ShenAbstract:A benefit of imprinted polymers is the possibility to prepare sorbents with selectivity pre-determined for a particular substance, or group of structural analogues. The application most close to a wider acceptance is probably that of Solid Phase Extraction for clean-up of environmental and biological samples. The technique of molecularly imprinted polymers to Solid Phase Extraction (MISPE) is performance and high selectively, compared with traditional sorbents. In this paper, the preparation and application of MIPs would be reviewed.
Mohammad Reza Ganjali - One of the best experts on this subject based on the ideXlab platform.
-
Molecularly imprinted Solid Phase Extraction for trace analysis of diazinon in drinking water.
Iranian Journal of Environmental Health Science & Engineering, 2009Co-Authors: M. Rahiminejad, Seyed Jamaleddin Shahtaheri, Mohammad Reza Ganjali, A. Rahimi Forushani, Farideh GolbabaeiAbstract:Amongst organophosphate pesticides, the one most widely used and common environmental contaminant is diazinon; thus methods for its trace analysis in environmental samples must be developed. Use of diazinon imprinted polymers such as sorbents in Solid Phase Extraction, is a prominent and novel application area of molecular imprinted polymers. For diazinon Extraction, high performance liquid chromatography analysis was demonstrated in this study. During optimization of the molecular imprinted Solid Phase Extraction procedure for efficient Solid Phase Extraction of diazinon, Plackett-Burman design was conducted. Eight experimental factors with critical influence on molecular imprinted Solid Phase Extraction performance were selected, and 12 different experimental runs based on Plackett-Burman design were carried out. The applicability of diazinon imprinted polymers as the sorbent in Solid Phase Extraction, presented obtained good recoveries of diazinon from LCgrade water. An increase in pH caused an increase in the recovery on molecular imprinted Solid Phase Extraction. From these results, the optimal molecular imprinted Solid Phase Extraction procedure was as follows: Solid Phase Extraction packing with 100 mg diazinon imprinted polymers; conditioning with 5 mL of methanol and 6 mL of LC-grade water; sample loading containing diazinon (pH=10); washing with 1 mL of LC-grade water, 1 mL LCgrade water containing 30% acetonitrile and 0.5 mL of acetonitrile, respectively; eluting with 1 mL of methanol containing 2% acetic acid. The percentage recoveries obtained by the optimized molecular imprinted Solid Phase Extraction were more than 90% with drinking water spiked at different trace levels of diazinon. Generally speaking, the molecular imprinted Solid Phase Extraction procedure and subsequent high performance liquid chromatography analysis can be a relatively fast and proper approach for qualitative and quantitative analysis of diazinon in drinking water.
-
Molecular Imprinted Solid Phase Extraction For Determination OfAtrazine In Environmental Samples
2008Co-Authors: Alireza Koohpaei, S J Shahtaheri, Mohammad Reza Ganjali, A. Rahimi Forushani, Farideh GolbabaeiAbstract:Solid Phase Extraction is one of the major applications of molecularly imprinted polymers fields for clean-up of environmental and biological samples namely molecularly imprinted Solid-Phase Extraction. In this study, Solid Phase Extraction using the imprinted polymer has been optimized with the experimental design approach for a triazine herbicide, named atrazine with regard to the critical factors which influence the molecular imprinted Solid Phase Extraction efficiency such as sample pH, concentration, flow-rate, volume, elution solvent, washing solvent and sorbent mass. Optimization methods that involve changing one factor at a time can be laborious. A novel approach for the optimization of imprinted Solid-Phase Extraction using chemometrics is described. The factors were evaluated statistically and also validated with spiked water samples and showed a good reproducibility over six consecutive days as well as six within-day experiments. Also, in order to the evaluate efficiency of the optimized molecularly imprinted Solid-Phase Extraction protocols, enrichment capacity, reusability and cross-reactivity of cartridges have been also evaluated. Finally, selective molecularly imprinted Solid-Phase Extraction of atrazine was successfully demonstrated with a recovery above 90% for spiked drinking water samples. It was concluded that the chemometrics is frequently employed for analytical method optimization and based on the obtained results, it is believed that the central composite design could prove beneficial for aiding the molecularly imprinted polymer and molecularly imprinted Solid-Phase Extraction development.
-
MOLECULAR IMPRINTED Solid Phase Extraction FOR DETERMINATION OF ATRAZINE IN ENVIRONMENTAL SAMPLES
Iranian Journal of Environmental Health Science & Engineering, 2008Co-Authors: A R Kouhpaei, Mohammad Reza Ganjali, Shahtaheri S.j.a.d., A Rahimi Foroushani, Golbabaei FaridehAbstract:Solid Phase Extraction is one of the major applications of molecularly imprinted polymers fields for clean-up of environmental and biological samples namely molecularly imprinted Solid-Phase Extraction. In this study, Solid Phase Extraction using the imprinted polymer has been optimized with the experimental design approach for a triazine herbicide, named atrazine with regard to the critical factors which influence the molecular imprinted Solid Phase Extraction efficiency such as sample pH, concentration, flow-rate, volume, elution solvent, washing solvent and sorbent mass. Optimization methods that involve changing one factor at a time can be laborious. A novel approach for the optimization of imprinted Solid-Phase Extraction using chemometrics is described. The factors were evaluated statistically and also validated with spiked water samples and showed a good reproducibility over six consecutive days as well as six within-day experiments. Also, in order to the evaluate efficiency of the optimized molecularly imprinted Solid-Phase Extraction protocols, enrichment capacity, reusability and cross-reactivity of cartridges have been also evaluated. Finally, selective molecularly imprinted Solid-Phase Extraction of atrazine was successfully demonstrated with a recovery above 90% for spiked drinking water samples. It was concluded that the chemometrics is frequently employed for analytical method optimization and based on the obtained results, it is believed that the central composite design could prove beneficial for aiding the molecularly imprinted polymer and molecularly imprinted Solid-Phase Extraction development.