Tahereh Rohani; Sayed Zia Mohammadi; Amirkhosro Beheshti; Hooshang Hamidian; Nasrin Gholamhosein Zadeh
Abstract
Herein, the electrooxidation of ascorbic acid and folic acid, as two essential vitamins, on the surface of the carbon ceramic electrode modified by polydopamine and copper (Cu/PDA/CCE) was investigated. Poly dopamine was fabricated by applying electro deposition conditions. Initial electrochemical characteristics ...
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Herein, the electrooxidation of ascorbic acid and folic acid, as two essential vitamins, on the surface of the carbon ceramic electrode modified by polydopamine and copper (Cu/PDA/CCE) was investigated. Poly dopamine was fabricated by applying electro deposition conditions. Initial electrochemical characteristics were performed to study the behavior of the fabricated electrode for simultaneous detection of two biomolecules. From voltametric studies using the developed electrode, two separated anodic peaks for folic acid and ascorbic acid were found promisingly for concurrent detection of the compounds. Linear calibration diagrams were obtained in the range of 0.5 to 360 μM and 0.83 to 380 μM with detection limits of about 0.031 and 0.057 μM for folic acid and ascorbic acid, respectively. The developed electrode was applied in human urine sample analysis with satisfying results
Hooshang Hamidian; Mahbobeh Mosavi Farahbakhsh; Rasool Roohparvar; Mohammad Reza Akhgar
Volume 3, Issue 1 , March 2016, , Pages 42-48
Abstract
The present study shows that the eggshell powder can be used as a natural adsorbent for the removal of alizarin (1,2-dihydroxyanthraquinone) and 2-aminoanthraquinone from aqueous solutions. Experiments were carried out as a function of contact time, concentration, temperature, pH and dosage. The amount ...
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The present study shows that the eggshell powder can be used as a natural adsorbent for the removal of alizarin (1,2-dihydroxyanthraquinone) and 2-aminoanthraquinone from aqueous solutions. Experiments were carried out as a function of contact time, concentration, temperature, pH and dosage. The amount of dye uptake was found to vary with increasing initial solution pH and maximum adsorption was observed at pH=7. The equilibrium was attained in 30 min. The amount of dye uptake (mg/g) was found to increase with increase in dye concentration and contact time. The percent of adsorption was found to decrease with increase in amount of adsorbent. The data were fitted with the Langmuir and Freundlich equations to describe the equilibrium isotherms.
