Massoud Kaykhaii - Academia.edu (original) (raw)
Papers by Massoud Kaykhaii
Trends in Analytical Chemistry, 2024
Pipette-tip micro solid-phase extraction (PT-μSPE) has emerged as a powerful technique for miniat... more Pipette-tip micro solid-phase extraction (PT-μSPE) has emerged as a powerful technique for miniaturized sample preparation, not only due to its simplicity, low solvent consumption, and high efficiency, but also because it requires just a few mg of adsorbent for performing extraction. Recently, there has been growing interest in enhancing the extraction performance of PT-μSPE by incorporating metal-organic frameworks (MOFs) as sorbents due to their advantageous properties, including high surface area, tunable pore structure, and diverse functionalities. This review provides a comprehensive overview of advances in MOF-based adsorbents for PT-μSPE, focusing on their synthesis, characterization, and applications in sustainable microextraction methodologies. The key strategies for enhancing the extraction performance of MOFs, including surface modification and integration with other functional materials, are discussed. Finally, the review discusses future trends and opportunities for enhancing the performance of MOF-based PT-μSPE, such as improving selectivity, developing reusable adsorbents, and exploring new applications.
This paper provides an overview of recent research performed on the applications of metal-organic... more This paper provides an overview of recent research performed on the applications of metal-organic frameworks (MOFs) for microplastics (MPs) removal from aqueous environments. MPs pollution has become a major environmental concern due to its negative impacts on aquatic ecosystems and human health. Therefore, developing effective and sustainable methods for removing them from aqueous environments is crucial. In recent years, MOFs have emerged as a promising solution for this purpose due to their unique properties such as high surface area, renewability, chemical stability, and versatility. Moreover, their specific properties such as their pore size and chemical composition can be tailored to enhance their efficiency in removing MPs. It has been shown that MOFs can effectively adsorb MPs from aqueous media in the range of 70-99.9%. Besides some high price concerns, the main drawback of using MOFs is their powder form which can pose challenges due to their instability. This can be addressed by supporting MOFs on other substrates such as aerogels or foams. Meanwhile, there is a need for more research to investigate the long-term stability of MOFs in aqueous environments and developing efficient regeneration methods for their repeated use.
Water Air and Soil Pollution, Jun 25, 2023
Industrial & Engineering Chemistry Research, Feb 22, 2023
Nashrieh Shimi va Mohandesi Shimi Iran, Jan 11, 2020
Nashrieh Shimi va Mohandesi Shimi Iran, Jul 23, 2011
Iranian Journal of Chemistry & Chemical Engineering-international English Edition, Feb 1, 2018
In this paper, a simple dispersive liquid-liquid microextraction for the extraction and pre-conce... more In this paper, a simple dispersive liquid-liquid microextraction for the extraction and pre-concentration of formaldehyde in seawater samples followed with spectrophotometric is proposed. Formaldehyde was derivatized in situ with acetyl acetone in the presence of ammonium acetate in a single step. Then it was collected into a mixture of ethanol (disperser solvent) and chloroform (extracting solvent). Experimental parameters which have an influence on the extraction, including type and volume of extracting and disperser solvent, pH of sample solution, the concentration of acetyl acetone and ammonium acetate, reaction time and temperature were evaluated and optimized. Under optimal experimental conditions, good linearity was observed in the range of 1-500 µg/L for the analyte with a limit of detection of 0.29 µg/L. The proposed method was applied to the analysis of real seawater samples. For spiked samples, good recoveries in the range of 97.7-101.5% were obtained. The relative standard deviations were below 2.1%. Using this method, formaldehyde content in seawater from several locations in Chabahar Bay (southeast Iran) were determined in the range of 1.4 to 4.8 µg/L.
Materials Science And Engineering: B, 2021
Results of this paper related to fabrication of a simple, selective, stable and sensitive electro... more Results of this paper related to fabrication of a simple, selective, stable and sensitive electrochemical sensing platform of amlodipine based on gold nanorods (GNRs)-graphene oxide (GO)-functionalized carbon nanotubes (fCNTs) nanocomposite. GNRs nanocomposite provides at least three important functions for electroanalysis; the roughening of the conductive sensing interface, catalytic features and conductivity properties. Electrochemical studies suggested that the GNRs-GO-fCNTs coated glassy carbon electrode (GCE) provides a synergistic augmentation on the voltammetric behaviour of electrochemical oxidation of amlodipine. After optimization of analytical conditions, the peak currents for amlodipine were found to vary linearly with its concentrations in the wide range of 0.01-1.0 and 1.0-75.0 μM. The estimated detection limit and sensitivity of the sensor were 3.0 nM and 1.07 μA μM − 1 , respectively. The practical applicability of the proposed method was demonstrated in the assessment of total content of amlodipine in pharmaceutical formulations with sufficient recovery (99.2%). Additionally, a biological relevance of the proposed methodology was demonstrated by analysis of human blood samples with satisfactory recoveries in the range of 98.2-101.8%.
Green Chemistry, 2022
Supramolecular Deep Eutectic Solvent (SUPRADES) – another milestone towards Green Chemistry.
Journal of The Chilean Chemical Society, Dec 1, 2015
Multi-walled carbon nano-tubes was modified with sodium dodecyl sulfate and used as a solid phase... more Multi-walled carbon nano-tubes was modified with sodium dodecyl sulfate and used as a solid phase extraction adsorbent for the determination of trace silver in radiological waste samples by flame absorption spectrometry. The effects of pH, initial silver ion concentration, sample flow rate and volume, elution conditions and the amount of adsorbent on the recovery of the analyte were investigated and optimized. The results showed that silver could be fully adsorbed at pH 7.0 and eluted by 5.0 mL 2% thiourea in HNO 3 (0.1 mol.L-1). Under the optimized conditions, the adsorption capacity of modified multi-walled carbon nano-tubes was found to be 3.2 mg.g-1 of silver. The detection limit of the proposed method was 350 µg. L-1 for silver with an enrichment factor of 35. The relative standard deviation for ten replicate measurement of 0.5 μg of silver from 700 mL samples was 4.7%. The analytical procedure was successfully applied to the determination of trace silver in a few radiological waste samples with the recoveries between 94% and 105%. Graphite furnace atomic absorption spectrometric technique was also used for the comparison with the suggested method for the determination of the real samples.
BMC chemistry, Apr 16, 2022
Background: A zirconium-based metal-organic framework (Zr-MOF), named MOF-808, was synthesized an... more Background: A zirconium-based metal-organic framework (Zr-MOF), named MOF-808, was synthesized and fully characterized by solvo-thermal method and functionalized by isonicotinic acid and employed as an efficient adsorbent for selective extraction and preconcentration of uranyl ions from water and waste water samples in a batch solid phase extraction. Results: Parameters affecting extraction such as volume and pH of the sample solution, the amount of sorbent, type and volume of eluting solvent, and adsorption and desorption times were investigated and optimized. Under the optimized conditions, high extraction efficiency was observed with a limit of detection of 0.9 µg L − 1 for uranyl ions and relative standard deviations were found to be better than 2.1% in the range of 0.07-1000 µg L − 1. Conclusions: These results indicated that the above procedure is fast, inexpensive, effective, reliable, applicable and organic solvent-free and showed the highly performance and stability of the Zr-MOF in SPE based analytical techniques.
![Research paper thumbnail of Simultaneous determination of droxidopa and carbidopa by carbon paste electrode functionalized with NiFe2O4 nanoparticle and 2-(4-ferrocenyl-[1,2,3]triazol-1-yl)-1-(naphthalen-2-yl) ethanone](https://attachments.academia-assets.com/115410948/thumbnails/1.jpg)
](Measurement, Apr 1, 2020
A novel carbon paste electrode modified with carbon nanotube and 5-amino-2'-ethyl-biphenyl-2-ol (... more A novel carbon paste electrode modified with carbon nanotube and 5-amino-2'-ethyl-biphenyl-2-ol (5AEB) was fabricated. The electrochemical study of the modified electrode, as well as its efficiency for electrocatalytic oxidation of droxidopa and carbidopa, is described. Cyclic voltammetry was used to investigate the redox properties of this modified electrode at various scan rates. The apparent charge transfer rate constant, k s , and transfer coefficient, ␣, for electron transfer between 5AEB and carbon nanotubes paste electrode were calculated as 17.3 ± 0.1 s −1 and 0.5, respectively. The electrode was also employed to study the electrocatalytic oxidation of droxidopa, using cyclic voltammetry, chronoamperometry, square wave voltammetry and electrochemical impedance spectroscopy as diagnostic techniques. It has been found that the oxidation of droxidopa at the surface of modified electrode occurs at a potential of about 355 mV less positive than that of an unmodified CPE. The diffusion coefficient, electron transfer coefficient, and heterogeneous rate constant, for oxidation of droxidopa at the modified electrode surface were also determined. Square wave voltammetry exhibits a linear dynamic range from 1.2 × 10 −7 to 2.25 × 10 −4 M and a detection limit of 50.0 nM for droxidopa. Finally this modified electrode was used for simultaneous determination of droxidopa and carbidopa for the first time.
DOAJ (DOAJ: Directory of Open Access Journals), Apr 1, 2018
This present work reports an ecofriendly approach for the synthesis of gold nanoparticles (Au NPs... more This present work reports an ecofriendly approach for the synthesis of gold nanoparticles (Au NPs) using aqueous stem extract of Periploca aphylla as a reducing and stabilizing agent, has been discussed. This approach is simple, cost-effective and stable for a long time, reproducible at room temperature and in an eco-friendly manner to obtain a selfassembly of Au NPs. Two parameters were optimised for the fabrication of gold nanoparticles including the pH and contact time. The resulting nanoparticles are characterized using UV-vis, TEM, XRD and FT-IR spectroscopic techniques. UV-visible spectra of the aqueous medium containing gold nanoparticles showed a surface plasmon resonance peak at 535 nm. Uniform spherical shapes were observed for biosynthesized Au NPs within range of 25-30 nm by transmission electron microscopy. XRD results confirmed the presence of gold nanoparticles with face centered cubic structure. FT-IR analysis was performed to analyze the biomolecules responsible for the reduction of Au NPs.
Current chromatography, Apr 5, 2017
A novel approach for dispersive liquid-liquid microextraction based on the use of deep eutectic s... more A novel approach for dispersive liquid-liquid microextraction based on the use of deep eutectic solvent as a disperser was presented for the first time. The procedure was automated based on an in-syringe flow system coupled with UV-Vis detection and demonstrated by the determination of chromium (VI) in beverages. This analytical task was used as a proof-of-concept example. The automated extraction procedure involved the aspiration of aqueous sample into a syringe pump with homogeneous mixture of extraction solvent (1-oсtanol) and deep eutectic solvent (tetrabutylammonium bromide-formic acid) containing color-forming reagent (1,5-diphenylcarbazide). This led to decomposition of deep eutectic solvent in aqueous phase resulting in dispersion of extraction solvent, oxidation of 1,5-diphenylcarbazide to 1,5-diphenylcarbazone in the presence of chromium (VI), and formation of colored chromium (III) complex with 1,5-diphenylcarbazone and its fast extraction. In this case composition of deep eutectic solvent played a key role for analyte extraction. Tetrabutylammonium bromide promoted mass transfer between aqueous phase and the extraction solvent droplets as a salting out agent, bromide ion acted as an ion-pare agent for analyte complex extraction, formic acid provided required pH value for analyte complex formation. Under the optimal conditions the limit of detection, calculated from a blank test based on 3s, was 0.2 μg L −1. The automated dispersive liquid-liquid microextraction using deep eutectic solvent as disperser can be considered as an available, efficient, rapid and environmentally friendly sample pretreatment approach.
Eurasian Journal of Analytical Chemistry, Dec 15, 2016
A novel liquid phase microextraction based on narrow bore-dispersive liquid-liquid microextractio... more A novel liquid phase microextraction based on narrow bore-dispersive liquid-liquid microextraction (NB-DLLME) is introduced and developed for preconcentration and extraction of cadmium in aquoeus samples using spectrophotometry. Unlike previous NB-DLLME methods, in this research work a solvent with a density higher than water (carbon tetrachloride) is used as extractant solvent. The effects of different parameters such as kind and volume of extractant and dispersive solvent, internal diameter and lengnth of narrow bore, and concentration of salt are studied and optimized. Under optimum conditions, dynamic range of calibration curve was linear in the range of 50-900 μg.L-1. The detection limit and relative standard deveiation were calculated to be 6.3 μg.L-1 and 6.4%, respectively.
Analytical Methods, 2019
A novel tantalum metal organic framework (Ta-MOF) was synthesized by a microwave assisted reverse... more A novel tantalum metal organic framework (Ta-MOF) was synthesized by a microwave assisted reverse micelle procedure, and it was used as a sorbent for pipette tip micro-solid phase extraction of nicotine from biological and environmental samples.
Analyst, 2019
Silver nanoparticles were coated on a glass stir bar and used for the extraction of heavy metals ... more Silver nanoparticles were coated on a glass stir bar and used for the extraction of heavy metals from water samples after their complexation with ligand PAN, followed by their HPLC determination.
Analytical Methods, 2016
In this work, a novel solid phase microextraction based on a carbon nanotube–zinc sulfide nano-co... more In this work, a novel solid phase microextraction based on a carbon nanotube–zinc sulfide nano-composite was developed and applied for the extraction and HPLC determination of trace amounts of mefenamic acid in urine samples.
Trends in Analytical Chemistry, 2024
Pipette-tip micro solid-phase extraction (PT-μSPE) has emerged as a powerful technique for miniat... more Pipette-tip micro solid-phase extraction (PT-μSPE) has emerged as a powerful technique for miniaturized sample preparation, not only due to its simplicity, low solvent consumption, and high efficiency, but also because it requires just a few mg of adsorbent for performing extraction. Recently, there has been growing interest in enhancing the extraction performance of PT-μSPE by incorporating metal-organic frameworks (MOFs) as sorbents due to their advantageous properties, including high surface area, tunable pore structure, and diverse functionalities. This review provides a comprehensive overview of advances in MOF-based adsorbents for PT-μSPE, focusing on their synthesis, characterization, and applications in sustainable microextraction methodologies. The key strategies for enhancing the extraction performance of MOFs, including surface modification and integration with other functional materials, are discussed. Finally, the review discusses future trends and opportunities for enhancing the performance of MOF-based PT-μSPE, such as improving selectivity, developing reusable adsorbents, and exploring new applications.
This paper provides an overview of recent research performed on the applications of metal-organic... more This paper provides an overview of recent research performed on the applications of metal-organic frameworks (MOFs) for microplastics (MPs) removal from aqueous environments. MPs pollution has become a major environmental concern due to its negative impacts on aquatic ecosystems and human health. Therefore, developing effective and sustainable methods for removing them from aqueous environments is crucial. In recent years, MOFs have emerged as a promising solution for this purpose due to their unique properties such as high surface area, renewability, chemical stability, and versatility. Moreover, their specific properties such as their pore size and chemical composition can be tailored to enhance their efficiency in removing MPs. It has been shown that MOFs can effectively adsorb MPs from aqueous media in the range of 70-99.9%. Besides some high price concerns, the main drawback of using MOFs is their powder form which can pose challenges due to their instability. This can be addressed by supporting MOFs on other substrates such as aerogels or foams. Meanwhile, there is a need for more research to investigate the long-term stability of MOFs in aqueous environments and developing efficient regeneration methods for their repeated use.
Water Air and Soil Pollution, Jun 25, 2023
Industrial & Engineering Chemistry Research, Feb 22, 2023
Nashrieh Shimi va Mohandesi Shimi Iran, Jan 11, 2020
Nashrieh Shimi va Mohandesi Shimi Iran, Jul 23, 2011
Iranian Journal of Chemistry & Chemical Engineering-international English Edition, Feb 1, 2018
In this paper, a simple dispersive liquid-liquid microextraction for the extraction and pre-conce... more In this paper, a simple dispersive liquid-liquid microextraction for the extraction and pre-concentration of formaldehyde in seawater samples followed with spectrophotometric is proposed. Formaldehyde was derivatized in situ with acetyl acetone in the presence of ammonium acetate in a single step. Then it was collected into a mixture of ethanol (disperser solvent) and chloroform (extracting solvent). Experimental parameters which have an influence on the extraction, including type and volume of extracting and disperser solvent, pH of sample solution, the concentration of acetyl acetone and ammonium acetate, reaction time and temperature were evaluated and optimized. Under optimal experimental conditions, good linearity was observed in the range of 1-500 µg/L for the analyte with a limit of detection of 0.29 µg/L. The proposed method was applied to the analysis of real seawater samples. For spiked samples, good recoveries in the range of 97.7-101.5% were obtained. The relative standard deviations were below 2.1%. Using this method, formaldehyde content in seawater from several locations in Chabahar Bay (southeast Iran) were determined in the range of 1.4 to 4.8 µg/L.
Materials Science And Engineering: B, 2021
Results of this paper related to fabrication of a simple, selective, stable and sensitive electro... more Results of this paper related to fabrication of a simple, selective, stable and sensitive electrochemical sensing platform of amlodipine based on gold nanorods (GNRs)-graphene oxide (GO)-functionalized carbon nanotubes (fCNTs) nanocomposite. GNRs nanocomposite provides at least three important functions for electroanalysis; the roughening of the conductive sensing interface, catalytic features and conductivity properties. Electrochemical studies suggested that the GNRs-GO-fCNTs coated glassy carbon electrode (GCE) provides a synergistic augmentation on the voltammetric behaviour of electrochemical oxidation of amlodipine. After optimization of analytical conditions, the peak currents for amlodipine were found to vary linearly with its concentrations in the wide range of 0.01-1.0 and 1.0-75.0 μM. The estimated detection limit and sensitivity of the sensor were 3.0 nM and 1.07 μA μM − 1 , respectively. The practical applicability of the proposed method was demonstrated in the assessment of total content of amlodipine in pharmaceutical formulations with sufficient recovery (99.2%). Additionally, a biological relevance of the proposed methodology was demonstrated by analysis of human blood samples with satisfactory recoveries in the range of 98.2-101.8%.
Green Chemistry, 2022
Supramolecular Deep Eutectic Solvent (SUPRADES) – another milestone towards Green Chemistry.
Journal of The Chilean Chemical Society, Dec 1, 2015
Multi-walled carbon nano-tubes was modified with sodium dodecyl sulfate and used as a solid phase... more Multi-walled carbon nano-tubes was modified with sodium dodecyl sulfate and used as a solid phase extraction adsorbent for the determination of trace silver in radiological waste samples by flame absorption spectrometry. The effects of pH, initial silver ion concentration, sample flow rate and volume, elution conditions and the amount of adsorbent on the recovery of the analyte were investigated and optimized. The results showed that silver could be fully adsorbed at pH 7.0 and eluted by 5.0 mL 2% thiourea in HNO 3 (0.1 mol.L-1). Under the optimized conditions, the adsorption capacity of modified multi-walled carbon nano-tubes was found to be 3.2 mg.g-1 of silver. The detection limit of the proposed method was 350 µg. L-1 for silver with an enrichment factor of 35. The relative standard deviation for ten replicate measurement of 0.5 μg of silver from 700 mL samples was 4.7%. The analytical procedure was successfully applied to the determination of trace silver in a few radiological waste samples with the recoveries between 94% and 105%. Graphite furnace atomic absorption spectrometric technique was also used for the comparison with the suggested method for the determination of the real samples.
BMC chemistry, Apr 16, 2022
Background: A zirconium-based metal-organic framework (Zr-MOF), named MOF-808, was synthesized an... more Background: A zirconium-based metal-organic framework (Zr-MOF), named MOF-808, was synthesized and fully characterized by solvo-thermal method and functionalized by isonicotinic acid and employed as an efficient adsorbent for selective extraction and preconcentration of uranyl ions from water and waste water samples in a batch solid phase extraction. Results: Parameters affecting extraction such as volume and pH of the sample solution, the amount of sorbent, type and volume of eluting solvent, and adsorption and desorption times were investigated and optimized. Under the optimized conditions, high extraction efficiency was observed with a limit of detection of 0.9 µg L − 1 for uranyl ions and relative standard deviations were found to be better than 2.1% in the range of 0.07-1000 µg L − 1. Conclusions: These results indicated that the above procedure is fast, inexpensive, effective, reliable, applicable and organic solvent-free and showed the highly performance and stability of the Zr-MOF in SPE based analytical techniques.
Measurement, Apr 1, 2020
A novel carbon paste electrode modified with carbon nanotube and 5-amino-2'-ethyl-biphenyl-2-ol (... more A novel carbon paste electrode modified with carbon nanotube and 5-amino-2'-ethyl-biphenyl-2-ol (5AEB) was fabricated. The electrochemical study of the modified electrode, as well as its efficiency for electrocatalytic oxidation of droxidopa and carbidopa, is described. Cyclic voltammetry was used to investigate the redox properties of this modified electrode at various scan rates. The apparent charge transfer rate constant, k s , and transfer coefficient, ␣, for electron transfer between 5AEB and carbon nanotubes paste electrode were calculated as 17.3 ± 0.1 s −1 and 0.5, respectively. The electrode was also employed to study the electrocatalytic oxidation of droxidopa, using cyclic voltammetry, chronoamperometry, square wave voltammetry and electrochemical impedance spectroscopy as diagnostic techniques. It has been found that the oxidation of droxidopa at the surface of modified electrode occurs at a potential of about 355 mV less positive than that of an unmodified CPE. The diffusion coefficient, electron transfer coefficient, and heterogeneous rate constant, for oxidation of droxidopa at the modified electrode surface were also determined. Square wave voltammetry exhibits a linear dynamic range from 1.2 × 10 −7 to 2.25 × 10 −4 M and a detection limit of 50.0 nM for droxidopa. Finally this modified electrode was used for simultaneous determination of droxidopa and carbidopa for the first time.
DOAJ (DOAJ: Directory of Open Access Journals), Apr 1, 2018
This present work reports an ecofriendly approach for the synthesis of gold nanoparticles (Au NPs... more This present work reports an ecofriendly approach for the synthesis of gold nanoparticles (Au NPs) using aqueous stem extract of Periploca aphylla as a reducing and stabilizing agent, has been discussed. This approach is simple, cost-effective and stable for a long time, reproducible at room temperature and in an eco-friendly manner to obtain a selfassembly of Au NPs. Two parameters were optimised for the fabrication of gold nanoparticles including the pH and contact time. The resulting nanoparticles are characterized using UV-vis, TEM, XRD and FT-IR spectroscopic techniques. UV-visible spectra of the aqueous medium containing gold nanoparticles showed a surface plasmon resonance peak at 535 nm. Uniform spherical shapes were observed for biosynthesized Au NPs within range of 25-30 nm by transmission electron microscopy. XRD results confirmed the presence of gold nanoparticles with face centered cubic structure. FT-IR analysis was performed to analyze the biomolecules responsible for the reduction of Au NPs.
Current chromatography, Apr 5, 2017
A novel approach for dispersive liquid-liquid microextraction based on the use of deep eutectic s... more A novel approach for dispersive liquid-liquid microextraction based on the use of deep eutectic solvent as a disperser was presented for the first time. The procedure was automated based on an in-syringe flow system coupled with UV-Vis detection and demonstrated by the determination of chromium (VI) in beverages. This analytical task was used as a proof-of-concept example. The automated extraction procedure involved the aspiration of aqueous sample into a syringe pump with homogeneous mixture of extraction solvent (1-oсtanol) and deep eutectic solvent (tetrabutylammonium bromide-formic acid) containing color-forming reagent (1,5-diphenylcarbazide). This led to decomposition of deep eutectic solvent in aqueous phase resulting in dispersion of extraction solvent, oxidation of 1,5-diphenylcarbazide to 1,5-diphenylcarbazone in the presence of chromium (VI), and formation of colored chromium (III) complex with 1,5-diphenylcarbazone and its fast extraction. In this case composition of deep eutectic solvent played a key role for analyte extraction. Tetrabutylammonium bromide promoted mass transfer between aqueous phase and the extraction solvent droplets as a salting out agent, bromide ion acted as an ion-pare agent for analyte complex extraction, formic acid provided required pH value for analyte complex formation. Under the optimal conditions the limit of detection, calculated from a blank test based on 3s, was 0.2 μg L −1. The automated dispersive liquid-liquid microextraction using deep eutectic solvent as disperser can be considered as an available, efficient, rapid and environmentally friendly sample pretreatment approach.
Eurasian Journal of Analytical Chemistry, Dec 15, 2016
A novel liquid phase microextraction based on narrow bore-dispersive liquid-liquid microextractio... more A novel liquid phase microextraction based on narrow bore-dispersive liquid-liquid microextraction (NB-DLLME) is introduced and developed for preconcentration and extraction of cadmium in aquoeus samples using spectrophotometry. Unlike previous NB-DLLME methods, in this research work a solvent with a density higher than water (carbon tetrachloride) is used as extractant solvent. The effects of different parameters such as kind and volume of extractant and dispersive solvent, internal diameter and lengnth of narrow bore, and concentration of salt are studied and optimized. Under optimum conditions, dynamic range of calibration curve was linear in the range of 50-900 μg.L-1. The detection limit and relative standard deveiation were calculated to be 6.3 μg.L-1 and 6.4%, respectively.
Analytical Methods, 2019
A novel tantalum metal organic framework (Ta-MOF) was synthesized by a microwave assisted reverse... more A novel tantalum metal organic framework (Ta-MOF) was synthesized by a microwave assisted reverse micelle procedure, and it was used as a sorbent for pipette tip micro-solid phase extraction of nicotine from biological and environmental samples.
Analyst, 2019
Silver nanoparticles were coated on a glass stir bar and used for the extraction of heavy metals ... more Silver nanoparticles were coated on a glass stir bar and used for the extraction of heavy metals from water samples after their complexation with ligand PAN, followed by their HPLC determination.
Analytical Methods, 2016
In this work, a novel solid phase microextraction based on a carbon nanotube–zinc sulfide nano-co... more In this work, a novel solid phase microextraction based on a carbon nanotube–zinc sulfide nano-composite was developed and applied for the extraction and HPLC determination of trace amounts of mefenamic acid in urine samples.