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33 results on '"Ariffin, Marinah Mohd"'

1. Kinetics, Isotherms, and Thermodynamic Studies on the Efficient Adsorption of Ionizable Organic β-Agonist (Ractopamine) in Aqueous Solution onto Mechanically Synthesized Copper (II) Isonicotinate Metal–Organic Frameworks [Cu (INA)2]-MOF

Author

Armaya’u, Usman, Ariffin, Marinah Mohd, Loh, Saw Hong, Khalik, Wan Mohd Afiq Wan Mohd, Yusoff, Hanis Mohd, Öchsner, Andreas, Series Editor, da Silva, Lucas F. M., Series Editor, Altenbach, Holm, Series Editor, Ismail, Azman, editor, Zulkipli, Fatin Nur, editor, Fitriadhy, Ahmad, editor, and Ahmad, Sayyid Zainal Abidin Syed, editor

Published
2024
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5. Adsorption of terbutaline β-agonists from wastewater by mechano-synthesized iron oxide nanoparticles modified copper (II) isonicotinate metal-organic framework

Author

Usman, Armaya’u, primary, Khoo, Kuan Shiong, additional, Ariffin, Marinah Mohd, additional, Loh, Saw Hong, additional, Wan Mohd Khalik, Wan Mohd Afiq, additional, Yusoff, Hanis Mohd, additional, Zango, Zakariyya Uba, additional, Aldaghri, Osamah, additional, Ibnaouf, Khalid Hassan, additional, Eisa, M.H., additional, Binzowaimil, Ayed M., additional, and Lim, Jun Wei, additional

Published
2024
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6. CO.sub.2-Effervescence in Liquid Phase Microextraction for the Determination of Micropollutants in Environmental Water: a Review

Author

Rajendran, Sarveishwhary, Loh, Saw Hong, Ariffin, Marinah Mohd, and Khalik, Wan Mohd Afiq Wan Mohd

Subjects
Micropollutants -- Chemical properties -- Analysis, Chemistry
Abstract

Liquid phase microextraction is a state-of-the-art micro-analytical work with numerous advantages documented in the scientific literature. One of the most intriguing subclasses is the CO.sub.2-effervescence assisted dispersive liquid-liquid microextraction method. Working theory was based on an acid-based reaction involving a proton donor and a carbon dioxide source. The paper outlines the considerations regarding the microextraction performance that can change in terms of physical, chemical properties, and its application for environmental sample analysis. A wide range of the developed and applied novel methods clearly indicates that CO.sub.2-effervescence is still in demand among researchers looking for new achievements in green analytical chemistry. This review focuses on the method application for the extraction and preconcentration of different classes of micropollutants (organic or inorganic) in environmental waters. New breakthroughs in the microextraction process show enhanced performance of the system in terms of sensitivity, accuracy, precision and the attempt to reduce extraction steps during separation or retrieval processes for low concentrations of analytes. Future direction refers to the improvement of green parameters in the microextraction, use of extracting agents as co-dispersers (solid or liquid), removal of elution dependency in solvents by the use of super-paramagnetic properties, etc. The success stories of the method development are widely documented in the literature. This microextraction technique will continue to serve as a reliable tool for the determination of micropollutants in environmental samples., Author(s): Sarveishwhary Rajendran [sup.1], Saw Hong Loh [sup.1], Marinah Mohd Ariffin [sup.1], Wan Mohd Afiq Wan Mohd Khalik [sup.1] Author Affiliations: (1) grid.412255.5, 0000 0000 9284 9319, Faculty of Science [...]

Published
2021
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9. Retraction notice to “Adsorption of terbutaline β-agonists from wastewater by mechano-synthesized iron oxide nanoparticles modified copper (II) isonicotinate metal-organic framework” [Environ. Res. 258 (2024) 119413]

Author

Usman, Armaya'u, Khoo, Kuan Shiong, Ariffin, Marinah Mohd, Loh, Saw Hong, Afiq Wan Mohd Khalik, Wan Mohd, Yusoff, Hanis Mohd, Zango, Zakariyya Uba, Aldaghri, Osamah, Ibnaouf, Khalid Hassan, Eisa, M.H., Binzowaimil, Ayed M., and Lim, Jun Wei

Published
2025
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13. The application of novel extraction and analytical techniques in forensic toxicology

Author

Ariffin, Marinah Mohd

Subjects
614.13, RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine
Abstract

The aim of this study was to investigate new methods of analysis which might be applied to forensic toxicology problems including those resulting from pesticides, particularly the quaternary ammonium herbicide group, and from drugs, particularly the benzodiazepine group. In the first part of this study, an efficient method for the determination of quaternary ammonium (QA) compounds (pesticides and drugs) in human whole blood was developed. The second part of this study concerned the development of a novel sorbents for solid phase extraction using molecularly imprinted polymers (MIPs). The approach adopted was initially to synthesise a known MIP using diazepam as template then to prepare novel MIPs using other benzodiazepines and analogues of QA compounds as templates. In the first of these stages, an anti-diazepam MIP was synthesized using methacrylate acid (MAA) as the monomer and ethylene glycol dimethacrylate (EGDMA) as the cross-liner and was then ground and prepared for use as an SPE sorbent by packing it into SPE cartridges. These cartridges were used to clean up extracts of diazepam and other benzodiazepine drugs made from hair samples via a molecularly imprinted solid-phase extraction (MISPE) protocol. The MISPE method was also found to be applicable to the analysis of diazepam metabolites and other benzodiazepine drugs in addition to diazepam itself. The application of the extraction method to post-mortem hair samples yielded results that were in good agreement with ELISA data (from blood samples) and data arising from the analysis of the same blood samples using a validated in-house SPE-LC-MS-MS method. The MISPE procedure was also compared with a conventional SPE method for analysis of benzodiazepines in hair samples. The results from MISPE protocol showed better selectivity, specificity and accuracy toward diazepam (template molecule) and other benzodiazepines that display a similar resemblance to diazepam in terms of molecular structure. The MISPE procedure was found to be simpler and to offer cleaner extracts compared to a conventional SPE method.

Published
2006

15. Enhanced Removal of Salbutamol in Water Solution Using Cu-Based Magnetic Designed Metal–Organic Frameworks: Kinetics and Isothermal Models and Statistical Analysis.

Author

Armaya'u, Usman, Ariffin, Marinah Mohd, Loh, Saw Hong, Wan Mohd Khalik, Wan Mohd Afiq, Badar, Nurhanna, Elong, Kelimah, and Yusoff, Hanis Mohd

Subjects
METAL-organic frameworks, ALBUTEROL, FOURIER transform infrared spectroscopy, STATISTICAL models, LEAD removal (Water purification), WATER use
Abstract

Clean water quality is dependent on the absence or complete removal of polar ionic micropollutant molecules and their associated products from the water. Utilizing copper Isonicotinate metal–organic frameworks ([Cu (INA)-MOF) a modified copper-based magnetic composite metal–organic framework ([Cu (INA)2]-MOF@Fe3O4) is mechanically synthesized under environmentally friendly conditions, and an adsorptive removal of salbutamol in water was successfully achieved in both synthesized materials. Characterization toward the materials has been carried out using X-ray diffraction, Brunauer–Emmett–Teller, field emission scanning microscopy, scanning electron microscopy, thermogravimetric analysis, and Fourier transform infrared spectroscopy. Our synthesized ([Cu (INA)2]-MOF@Fe3O4 used as an adsorbent in water showed enhanced performance in the removal of the model salbutamol within a shorter contact time (40 min) with the pseudo-second-order and Langmuir models providing the most accurate statistical descriptions of the process's kinetics and isotherms, respectively, while thermodynamic studies indicated that the process was endothermic, spontaneous, and the material demonstrated very good reusability and regeneration with a very good percentage recovery even after the fifth cycle. [ABSTRACT FROM AUTHOR]

Published
2024
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18. Evaluation of Terbutaline Adsorption from Aqueous Medium by Mechanically Generated [Cu (INA)2]-MOF Metal-Organic Framework and its Modified Magnetic Composite ([Cu (INA)2]-MOF@Fe3O4)

Author

Armaya’u, Usman, Ariffin, Marinah Mohd, Loh, Saw Hong, Khalik, Wan Mohd Afiq Wan Mohd, and Yusoff, Hanis Mohd

Subjects
analytical_chemistry
Abstract

Mechanochemical production of copper (II) isonicotinate Metal-Organic Framework ([Cu (INA)2]-MOF) and its modified magnetic iron composite ([Cu (INA)2]-MOF@Fe3O4]) allowed for the adsorptive removal of Terbutaline from water. A variety of characterization techniques, including Fourier, transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM), were used to elucidate the distinct chemical and morphological features of the two advanced materials. The optimal adsorption conditions were determined by investigating a wide range of adsorption-related variables, including contact time, initial Terbutaline concentration, adsorbent dosages pH, and temperature. The chemistry involved in the adsorption process between the adsorbents and the adsorbate molecules was evaluated using the best-fitting models, such as kinetics, isotherms, and thermodynamics, and the regeneration study was performed to evaluate the adsorbents' reusability. Incredibly maximum adsorption capacities (Qmax) of 1667 and 2500 mg L-1 were attained within 40 minutes under alkaline pH 11 by the [Cu (INA)2]-MOF and the [Cu (INA)2]-MOF@Fe3O4, respectively. The adsorbents have been proven to be good for the adsorption of Terbutaline as a priority pollutant in an aqueous solution, with pseudo-first order and Langmuir as the best-fitting models for the kinetic and isotherm models respectively.

Published
2022
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23. β-Agonist in the environmental waters: a review on threats and determination methods.

Author

Armaya'u, Usman, Ariffin, Marinah Mohd, Loh, Saw Hong, Mohd Khalik, Wan Mohd Afiq Wan, and Yusoff, Hanis Mohd

Subjects
*CHRONIC obstructive pulmonary disease, *HIGH performance liquid chromatography, *SOLID phase extraction
Abstract

β-agonists are a class of synthetic phenylethanolamine compounds that were originally designed to reduce asthma and chronic obstructive pulmonary disease. They remain widely used but unfortunately, misuse in animal farming and sports activities due to their huge medical and economic benefits. As a result, they have been found in a variety of matrices and subsequently end up in multiple water bodies in the environment. However, their environmental occurrence and fates are only evaluated on an occasional basis as they happen at a very trace level. The development of appropriate analytical procedures is critical in providing reliable data related to their occurrence and concentrations in various water bodies. Coupling high-performance liquid chromatography and mass spectrometry have been the most extensively used approach for great sensitivity and high selectivity for their determination in the environment. Sample preparation is important for obtaining lower detection limits, and the online solid-phase extraction has been comprehensively used considering the physicochemical properties of β-agonists. This review presented the systematic development of the preceding research on β-agonist detection approaches published between 1985-2020, emphasizing their analysis, resolution in environmental waters, and highlighting the significant scientific approach from the existing analytical techniques suitable for their ultra-trace determination. [ABSTRACT FROM AUTHOR]

Published
2022
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24. CO2-Effervescence in Liquid Phase Microextraction for the Determination of Micropollutants in Environmental Water: a Review.

Author

Rajendran, Sarveishwhary, Loh, Saw Hong, Ariffin, Marinah Mohd, and Khalik, Wan Mohd Afiq Wan Mohd

Subjects
SCIENTIFIC literature, ENVIRONMENTAL sampling, MICROPOLLUTANTS, LIQUIDS, ANALYTICAL chemistry, CHEMICAL properties, LIQUID-liquid extraction, EXTRACTION techniques
Abstract

Liquid phase microextraction is a state-of-the-art micro-analytical work with numerous advantages documented in the scientific literature. One of the most intriguing subclasses is the CO2-effervescence assisted dispersive liquid−liquid microextraction method. Working theory was based on an acid-based reaction involving a proton donor and a carbon dioxide source. The paper outlines the considerations regarding the microextraction performance that can change in terms of physical, chemical properties, and its application for environmental sample analysis. A wide range of the developed and applied novel methods clearly indicates that CO2-effervescence is still in demand among researchers looking for new achievements in green analytical chemistry. This review focuses on the method application for the extraction and preconcentration of different classes of micropollutants (organic or inorganic) in environmental waters. New breakthroughs in the microextraction process show enhanced performance of the system in terms of sensitivity, accuracy, precision and the attempt to reduce extraction steps during separation or retrieval processes for low concentrations of analytes. Future direction refers to the improvement of green parameters in the microextraction, use of extracting agents as co-dispersers (solid or liquid), removal of elution dependency in solvents by the use of super-paramagnetic properties, etc. The success stories of the method development are widely documented in the literature. This microextraction technique will continue to serve as a reliable tool for the determination of micropollutants in environmental samples. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

30. The application of novel extraction and analytical techniques in forensic toxicology

Author

Ariffin, Marinah Mohd and Ariffin, Marinah Mohd

Abstract

The aim of this study was to investigate new methods of analysis which might be applied to forensic toxicology problems including those resulting from pesticides, particularly the quaternary ammonium herbicide group, and from drugs, particularly the benzodiazepine group. In the first part of this study, an efficient method for the determination of quaternary ammonium (QA) compounds (pesticides and drugs) in human whole blood was developed. The second part of this study concerned the development of a novel sorbents for solid phase extraction using molecularly imprinted polymers (MIPs). The approach adopted was initially to synthesise a known MIP using diazepam as template then to prepare novel MIPs using other benzodiazepines and analogues of QA compounds as templates. In the first of these stages, an anti-diazepam MIP was synthesized using methacrylate acid (MAA) as the monomer and ethylene glycol dimethacrylate (EGDMA) as the cross-liner and was then ground and prepared for use as an SPE sorbent by packing it into SPE cartridges. These cartridges were used to clean up extracts of diazepam and other benzodiazepine drugs made from hair samples via a molecularly imprinted solid-phase extraction (MISPE) protocol. The MISPE method was also found to be applicable to the analysis of diazepam metabolites and other benzodiazepine drugs in addition to diazepam itself. The application of the extraction method to post-mortem hair samples yielded results that were in good agreement with ELISA data (from blood samples) and data arising from the analysis of the same blood samples using a validated in-house SPE-LC-MS-MS method. The MISPE procedure was also compared with a conventional SPE method for analysis of benzodiazepines in hair samples. The results from MISPE protocol showed better selectivity, specificity and accuracy toward diazepam (template molecule) and other benzodiazepines that display a similar resemblance to diazepam in terms of molecular structure. The MISPE proce

31. The application of novel extraction and analytical techniques in forensic toxicology

Author

Ariffin, Marinah Mohd and Ariffin, Marinah Mohd

Abstract

The aim of this study was to investigate new methods of analysis which might be applied to forensic toxicology problems including those resulting from pesticides, particularly the quaternary ammonium herbicide group, and from drugs, particularly the benzodiazepine group. In the first part of this study, an efficient method for the determination of quaternary ammonium (QA) compounds (pesticides and drugs) in human whole blood was developed. The second part of this study concerned the development of a novel sorbents for solid phase extraction using molecularly imprinted polymers (MIPs). The approach adopted was initially to synthesise a known MIP using diazepam as template then to prepare novel MIPs using other benzodiazepines and analogues of QA compounds as templates. In the first of these stages, an anti-diazepam MIP was synthesized using methacrylate acid (MAA) as the monomer and ethylene glycol dimethacrylate (EGDMA) as the cross-liner and was then ground and prepared for use as an SPE sorbent by packing it into SPE cartridges. These cartridges were used to clean up extracts of diazepam and other benzodiazepine drugs made from hair samples via a molecularly imprinted solid-phase extraction (MISPE) protocol. The MISPE method was also found to be applicable to the analysis of diazepam metabolites and other benzodiazepine drugs in addition to diazepam itself. The application of the extraction method to post-mortem hair samples yielded results that were in good agreement with ELISA data (from blood samples) and data arising from the analysis of the same blood samples using a validated in-house SPE-LC-MS-MS method. The MISPE procedure was also compared with a conventional SPE method for analysis of benzodiazepines in hair samples. The results from MISPE protocol showed better selectivity, specificity and accuracy toward diazepam (template molecule) and other benzodiazepines that display a similar resemblance to diazepam in terms of molecular structure. The MISPE proce

32. The application of novel extraction and analytical techniques in forensic toxicology

Author

Ariffin, Marinah Mohd and Ariffin, Marinah Mohd

Abstract

The aim of this study was to investigate new methods of analysis which might be applied to forensic toxicology problems including those resulting from pesticides, particularly the quaternary ammonium herbicide group, and from drugs, particularly the benzodiazepine group. In the first part of this study, an efficient method for the determination of quaternary ammonium (QA) compounds (pesticides and drugs) in human whole blood was developed. The second part of this study concerned the development of a novel sorbents for solid phase extraction using molecularly imprinted polymers (MIPs). The approach adopted was initially to synthesise a known MIP using diazepam as template then to prepare novel MIPs using other benzodiazepines and analogues of QA compounds as templates. In the first of these stages, an anti-diazepam MIP was synthesized using methacrylate acid (MAA) as the monomer and ethylene glycol dimethacrylate (EGDMA) as the cross-liner and was then ground and prepared for use as an SPE sorbent by packing it into SPE cartridges. These cartridges were used to clean up extracts of diazepam and other benzodiazepine drugs made from hair samples via a molecularly imprinted solid-phase extraction (MISPE) protocol. The MISPE method was also found to be applicable to the analysis of diazepam metabolites and other benzodiazepine drugs in addition to diazepam itself. The application of the extraction method to post-mortem hair samples yielded results that were in good agreement with ELISA data (from blood samples) and data arising from the analysis of the same blood samples using a validated in-house SPE-LC-MS-MS method. The MISPE procedure was also compared with a conventional SPE method for analysis of benzodiazepines in hair samples. The results from MISPE protocol showed better selectivity, specificity and accuracy toward diazepam (template molecule) and other benzodiazepines that display a similar resemblance to diazepam in terms of molecular structure. The MISPE proce

33. The application of novel extraction and analytical techniques in forensic toxicology

Author

Ariffin, Marinah Mohd and Ariffin, Marinah Mohd

Abstract

The aim of this study was to investigate new methods of analysis which might be applied to forensic toxicology problems including those resulting from pesticides, particularly the quaternary ammonium herbicide group, and from drugs, particularly the benzodiazepine group. In the first part of this study, an efficient method for the determination of quaternary ammonium (QA) compounds (pesticides and drugs) in human whole blood was developed. The second part of this study concerned the development of a novel sorbents for solid phase extraction using molecularly imprinted polymers (MIPs). The approach adopted was initially to synthesise a known MIP using diazepam as template then to prepare novel MIPs using other benzodiazepines and analogues of QA compounds as templates. In the first of these stages, an anti-diazepam MIP was synthesized using methacrylate acid (MAA) as the monomer and ethylene glycol dimethacrylate (EGDMA) as the cross-liner and was then ground and prepared for use as an SPE sorbent by packing it into SPE cartridges. These cartridges were used to clean up extracts of diazepam and other benzodiazepine drugs made from hair samples via a molecularly imprinted solid-phase extraction (MISPE) protocol. The MISPE method was also found to be applicable to the analysis of diazepam metabolites and other benzodiazepine drugs in addition to diazepam itself. The application of the extraction method to post-mortem hair samples yielded results that were in good agreement with ELISA data (from blood samples) and data arising from the analysis of the same blood samples using a validated in-house SPE-LC-MS-MS method. The MISPE procedure was also compared with a conventional SPE method for analysis of benzodiazepines in hair samples. The results from MISPE protocol showed better selectivity, specificity and accuracy toward diazepam (template molecule) and other benzodiazepines that display a similar resemblance to diazepam in terms of molecular structure. The MISPE proce

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