Entity

Time filter

Source Type

Eşfahān, Iran

Bakhshi M.,Sooreh Company | Arab H.,Sooreh Company | Amini M.K.,Sooreh Company | Amini M.K.,University of Isfahan
Journal of the Iranian Chemical Society | Year: 2016

Several sample preparation methods were evaluated for determination of free carbon in boron carbide powders by quantitative X-ray diffraction method, including ultrasonication, wet ball milling and dry ball milling–wet mixing. Quantitation was based on measuring the integral peak area ratio of the diffraction lines of graphite (002) to boron carbide (012) in samples spiked with pure graphite. The dry milling–wet mixing method provided the best precision and accuracy in all the measurements as well as in determination of free carbon in a boron carbide reference material. There was a linear relationship between the integral peak area ratios and graphite added to boron carbide samples which were purified from their free carbon content. The method provided a low detection limit of 0.05 wt% free carbon. © 2016, Iranian Chemical Society. Source


Rashidi Nassab H.,Sooreh Company | Souri A.,Sooreh Company | Javadian A.,Sooreh Company | Amini M.K.,Sooreh Company | Amini M.K.,University of Isfahan
Sensors and Actuators, B: Chemical | Year: 2015

A novel mercury-free electrochemical sensor was developed for cathodic stripping voltammetric determination of uranium. The sensor is based on a polymer coated glassy carbon electra,ode obtained by electropolymerization of N-phenylanthranilic acid using multicyclic voltammetry. The influence of several parameters such as concentration of the monomer, number of electropolymerization cycles, pH and accumulation time on the sensitivity of uranium measurement were studied. Under the optimal experimental conditions, the differential pulse cathodic stripping voltammetric peak current is proportional to the concentration of uranium in the range of 0.5-35 ng mL-1 with a detection limit of 0.15 ng mL-1. The influence of several co-existing metal ions as possible interferences was investigated. The applicability of the method for real sample analysis was tested by determination of uranium in waste water from uranium conversion facility and natural water samples. The new polymer-based uranium sensor holds great promise for sensitive determination of this element in environmental and industrial samples. © 2015 Elsevier B.V. Source


RashidiNassab H.,Sooreh Company | Bakhshi M.,Sooreh Company | Amini M.K.,University of Isfahan
Electroanalysis | Year: 2014

N-Phenylanthranilic acid was used as a complexing agent for determination of uranium(VI) by adsorptive cathodic stripping voltammetry. Under the optimal experimental conditions of the experimental parameters, the peak current was proportional to the concentration of U(VI) in the range 0.75-30ngmL-1 and the detection limit was 0.036ngmL-1. The influence of possible interferences was investigated. The method was applied for determination of uranium in waste water from uranium conversion facility and natural water samples. Application of the method for simultaneous determination of U(VI) and Cu(II) showed that these ions could be simultaneously determined in a single scan at relatively wide concentration range. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

Discover hidden collaborations