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Comparative Voltammetric Behavior and Determination of Mephenesin in Pure Form, Pharmaceuticals and Biological Fluids at Pencil Graphite and Glassy Carbon Electrodes
Ehab El-Kady,
Hoda El-Qudaby,
Marwa Omran
Issue:
Volume 7, Issue 2, March 2019
Pages:
32-41
Received:
28 February 2019
Accepted:
3 April 2019
Published:
7 May 2019
Abstract: New voltammetric methods are introduced for the determination of a skeletal muscle relaxant namely; mephenesin (Mep) in its pure form with the application in the pharmaceutical preparation and biological fluids. Three voltammetric methods namely; cyclic voltammetry (CV), differential pulse voltammetry (DPV) and square wave voltammetry (SWV) using pencil graphite electrode (PGE) and glassy carbon electrode (GCE) were used. Voltammetric behavior of Mep was investigated in Britton Robinson (BR) buffer as electrolyte in pH range 2-10. CV produced one irreversible anodic peak revealing oxidation reaction in pH 6 as maximum pH value at 1.33 and 1.36 V using PGE and GCE, respectively. At PGE, DPV and SWV were investigated and linearity ranges were 18.02-119.07 and 18.02-70.0 µg/mL with correlation coefficient 0.9997 and 0.9995, LOD values were found to be 0.113 and 0.059 µg/mL, respectively. At GCE, linearity ranges were 9.05-44.39 and 4.54-65.78 µg/mL with correlation coefficient 0.9996 and 0.9999, LOD values were 0.553 and 0.865 µg/mL at DPV and SWV, respectively. The proposed methods were applied with good recovery in pharmaceutical preparation, human mother milk and urine. They were validated and revealed accurate and precise results.
Abstract: New voltammetric methods are introduced for the determination of a skeletal muscle relaxant namely; mephenesin (Mep) in its pure form with the application in the pharmaceutical preparation and biological fluids. Three voltammetric methods namely; cyclic voltammetry (CV), differential pulse voltammetry (DPV) and square wave voltammetry (SWV) using p...
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Removal of Malachite Green Dye from Aqueous Solution by Adsorption Using Modified and Unmodified Local Agriculture Waste
Mohammed Saleh Bashanaini,
Mohammed Hadi Al-Douh,
Hanan Saeed Al-Ameri
Issue:
Volume 7, Issue 2, March 2019
Pages:
42-56
Received:
7 April 2019
Accepted:
23 May 2019
Published:
3 June 2019
Abstract: Local agriculture waste (Shell’s seeds of Ziziphus spina christi) (SZC), in both its unmodified SZC and acid-modified (SZC-AC) forms, was investigated for its potential use as a low-cost adsorbent for the removal of malachite green (MG). Characterization of the adsorbents was carried out using scanning electron microscope (SEM), Fourier transforms infra-red spectroscopy (FTIR), pH surface, Boehm titration, including, other physical and chemical properties of adsorbent. The effects of initial dye concentration, contact time, solution of pH, temperature and adsorbent dosage were investigated in detail by batch adsorption experiments. For the adsorption of MG were fitted using Langmuir and Freundlich isotherm models, equilibrium isotherms were applicable with maximum monolayer adsorption capacity wear 48.780 mg/g and 370.370 mg/g for the raw shells seeds of Ziziphus spina christi (SZC) and the activated carbon prepared from shells seeds by sulphuric acid SZC-AC, respectively. Kinetics studies showed that both followed the pseudo-second order. Thermodynamics studies indicated that the adsorption of MG was spontaneous on SZC and SZC-AC, and the reactions were endothermic and exothermic, respectively. The proposed adsorbents were successfully applied to the removal of malachite green dye from different water samples with a recovery % >95% and a relative standard deviation (RSD%) <3%.
Abstract: Local agriculture waste (Shell’s seeds of Ziziphus spina christi) (SZC), in both its unmodified SZC and acid-modified (SZC-AC) forms, was investigated for its potential use as a low-cost adsorbent for the removal of malachite green (MG). Characterization of the adsorbents was carried out using scanning electron microscope (SEM), Fourier transforms ...
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The Microbial Status and Physico-Chemical Pollutants Studies of Rivers Owan and Evbiobe in Edo State, Nigeria
Oyakhilome Gloria Irenosen,
Ajiwe Vincent Ishmael Egbulefu,
Akinola Olufemi Korede
Issue:
Volume 7, Issue 2, March 2019
Pages:
57-64
Received:
23 May 2018
Accepted:
12 June 2018
Published:
11 July 2019
Abstract: The areas of study are Rivers Owan and Evbiobe, which transverse respectively through Owan East and Owan West Local Government Areas of Edo State, Nigeria. Owan river is a washing zone for automobiles of all sorts on daily basis while a major market site is located behind Evbiobe river; thus exposing the rivers to high level of quality degradation and bacteriological pollution. The rivers serve as drinking water source and other domestic uses to the communities around the study areas. Water samples were collected at ten locations within Rivers Owan and Evbiobe over a period of twelve months, covering both dry and wet seasons. The water samples were analysed for water bacteriological and physico-chemical characteristics using methods prescribed by APHA (1998), Aiyesanmi (2008) and Oyakhilome et al. (2012). These rivers were highly polluted with bacteria load as observed in the results of the study when compared with their guideline values. The statistical analyses conducted on the physico-chemical parameters revealed high level of significant difference (p< 0.05) between wet and dry seasons’ values for all parameters except Total Suspended Solid and Chemical Oxygen Demand in Owan river. The pollution of the rivers could be attributed to influx through runoff of microorganisms from vegetation decay, municipal sewage, garbage, domestic and fecal waste into the rivers, especially during the wet season. This calls for a need in the periodic monitoring of the water bodies so as to prevent or minimize the pollution of these rivers in the future.
Abstract: The areas of study are Rivers Owan and Evbiobe, which transverse respectively through Owan East and Owan West Local Government Areas of Edo State, Nigeria. Owan river is a washing zone for automobiles of all sorts on daily basis while a major market site is located behind Evbiobe river; thus exposing the rivers to high level of quality degradation ...
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