جستجوی مقالات مرتبط با کلیدواژه "co (ii) ion" در نشریات گروه "مواد و متالورژی"
تکرار جستجوی کلیدواژه «co (ii) ion» در نشریات گروه «فنی و مهندسی»-
International Journal Of Bio-Inorganic Hybrid Nanomaterials, Volume:10 Issue: 2, Summer 2021, PP 83 -93
A flame atomic absorption spectrophotometric (FAAS) method for the determination of trace Co(II) after adsorption of synthesis 2-aminopyridine/graphene oxide nano-plates has been developed. Applying a facile and accessible sample preparation method is highly important before the experimental analysis process. In the current study, a technique was introduced for preconcentration and analysis of trace amounts of Co(II) ions in water samples. The important parameters in the analytical procedure of Co(II) ions were optimized such as the pH of extraction, amount and type of elution solvent, time of extraction, and the effect of another ion. Analytical parameters such as the concentration factor, the limit of detection (LOD) of the technique, and relative standard deviation (RSD %) were achieved as 20, 8.0 μg L-1, and 2.4%, respectively.
Keywords: Co (II) ion, Extraction, Graphene oxide nano-plates, Heavy metal, Preconcentration of heavy metals, SPE -
International Journal Of Bio-Inorganic Hybrid Nanomaterials, Volume:10 Issue: 1, Spring 2021, PP 17 -25
A flame atomic absorption spectrophotometric (FAAS) method for the determination of trace Co(II) after adsorption of synthesis modified with methionine-glutaraldehyde schiff’s base (MG-Chi/Fe3O4) nano-biosorbent has been developed. Applying a facile and accessible sample preparation method is highly important before the experimental analysis process. In the current study, a technique was introduced for preconcentration and analysis of trace amounts of Co(II) ions in water samples. The important parameters in the analytical procedure of Co(II) ions were optimized such as the pH of extraction, amount and type of elution solvent, time of extraction, and the effect of another ion. Analytical parameters such as the concentration factor, the limit of detection (LOD) of the technique, and relative standard deviation (RSD %) were achieved as 20, 10.0 μg L-1, and 2.8%, respectively.
Keywords: Co(II) ion, Modified with methionine-glutaraldehyde schiff’s base, (MG-Chi, Fe3O4) nano-biosorbent, Preconcentration of heavy metals, SPE -
International Journal Of Bio-Inorganic Hybrid Nanomaterials, Volume:9 Issue: 4, Winter 2021, PP 221 -231
A flame atomic absorption spectrophotometric (FAAS) method for the determination oftrace Co(II) after adsorption of synthesis modify Multi walled carbon nanotubes carboxylate has beendeveloped. Applying a facile and accessible sample preparation method is highly important before theexperimental analysis process. In the current study, a technique was introduced for preconcentrationand analysis of trace amounts of Co(II) ions in water samples. The important parameters in the analyticalprocedure of Co(II) ions were optimized such as the pH of extraction, amount and type of elution solvent,time of extraction, and the effect of another ion. Analytical parameters such as the concentration factor,the limit of detection (LOD) of the technique, and relative standard deviation (RSD %) were achieved as20, 9.0 μg L-1, and 2.7%, respectively.
Keywords: Co (II) ion, Modified nanotube carbon carboxyl, Preconcentration of heavy metals, SPE -
International Journal Of Bio-Inorganic Hybrid Nanomaterials, Volume:9 Issue: 2, Summer 2020, PP 103 -113
A flame atomic absorption spectrophotometric (FAAS) method for the determination oftrace Co(II) after adsorption of synthesis modify Multi walled carbon nanotubes carboxylate has beendeveloped. Applying a facile and accessible sample preparation method is highly important before theexperimental analysis process. In the current study, a technique was introduced for preconcentrationand analysis of trace amounts of Co(II) ions in water samples. The important parameters in the analyticalprocedure of Co(II) ions were optimized such as the pH of extraction, amount and type of elution solvent,time of extraction, and the effect of another ion. Analytical parameters such as the concentration factor,the limit of detection (LOD) of the technique, and relative standard deviation (RSD %) were achieved as20, 9.0 μg L-1, and 2.7%, respectively.
Keywords: Co (II) ion, Modified nanotube carbon carboxyl, Preconcentration of heavy metals, SPE -
International Journal Of Bio-Inorganic Hybrid Nanomaterials, Volume:7 Issue: 1, Spring 2018, PP 43 -57Applying a simple and selective sample preparation procedure prior to instrumental analysis is the most important and crucial step in an analytical process. Up to now, various sample preparation techniques based on solid phase extraction (SPE) systems have been developed to isolate various types of analytes from different matrices. In the method presented for preconcentration and measurement of trace amounts of cobalt (II) ions in aqueous samples, carbon nanotubes functionalized with carboxyl were used for improving the extraction and preconcentration action. Measurement of Co2+ ion concentration in aqueous solutions was performed by flame atomic absorption spectroscopy. The parameters including the extraction including pH, amount and type of desorption solvent, extraction time, the effect of other ions, etc. were optimized. The concentration factor, level of detection (LOD) of the method, and relative standard deviation (RSD %) were obtained as 20.83, 6 μg.L-1, and 1.16%, respectivelyKeywords: Carbon nanotubes functionalized with carboxyl, Co (II) ion, FAAS, Flame atomic absorption spectroscopy, Preconcentration, SPE
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