نتایج جستجو برای: voltammetry chemical analysis
تعداد نتایج: 3134106 فیلتر نتایج به سال:
In this paper, the electrochemical hydrogen storage in nanocomposite materials was studied. Multi-Walled Carbon Nanotubes (MWCNTs) electrode was prepared by mixing with special composite. The optimum ratio of MWCNTs was estimated 30-70% (w/w) in the composite material. MWCNTs were synthesized by Chemical vapor deposition (CVD). The nanocomposite was homogenized by microwave. Cyclic voltammetry ...
In this article a novel, sensitive and selective cathodic adsorptive stripping procedure is reported for determining of lead. The method is based on adsorptive accumulation of PbN-Nitrozo-N-Phenylhydroxylamine on a hanging mercury drop electrode, followed by the reduction of adsorbed specie by voltammetric scan while followed differential pulse modulation. The optimum conditions for analysis of...
In this study, yttrium aluminum garnet (YAG) was prepared using a facile electrochemical technique. Four samples were synthesized in 0, 20, 40 and 60°C by electrochemical pulse deposition and were then calcined at 1200°C. The effect of synthesis temperature on morphology and structure of YAG was studied using X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron micro...
در این تحقیق، تکنیک جدید میکرو استخراج فاز جامد به روش هیبرید سل - ژل مسلح شده با نانو لوله های کربنی چند دیواره عامل دار شده در فیبر توخالی برای استخراج و اندازه گیری همزمان کادمیم، سرب و مس در برنج بکار گرفته شد. این تکنیک یک سیستم دو فازی است که در آن فاز دهنده، نمونه های آبی حاوی کاتیون های +cu2+ ، pb2 و‍ِ+cd2 می باشد، و فاز گیرنده شامل هیبرید سل - ژل مسلح شده با نانولوله های کربنی چند دیوار...
Aquatic environments are complex living systems where biological and chemical constituents change rapidly with time and space and may exhibit synergistic interactions. To understand these processes, the traditional approach based on a typically monthly collection of samples followed by laboratory analysis is not adequate. It must be replaced by high-resolution autonomous in situ detection appro...
In the present study, magnetic core-shell manganese ferrite nanoparticles (MCMNP) were synthesized and used for construction of a magnetic core-shell manganese ferrite nanoparticles modified screen-printed carbon electrode (MCSNP-SPCE). Cyclic voltammetry was used to study the electrochemical behavior of chlorpromazine (CPZ) and its determination was conducted by applying square wave voltammetr...
the growth rate and uniformity of carbon nano tubes (cnts) based on chemical vapor deposition (cvd) technique is investigated by using a numerical model. in this reactor, inlet gas mixture, including xylene as carbon source and mixture of argon and hydrogen as carrier gas enters into a horizontal cvd reactor at atmospheric pressure. based on the gas phase and surface reactions, released carbon...
The application of batch injection analysis to the determination of trace metals in samples of volume s 100 ~1 by square wave anodic stripping voltammetry has been investigated in detail, using a programmable electronic micropipette. The in situ formation of a mercury film on a glassy carbon electrode substrate, the influence of preconcentration time, injection rate and injected volume of analy...
nickel can also be determined using a copper anode. Conditions are similar to those for nickel except that the applied potentials must be 200 mV more positive than for nickel. The anodic reaction rate constants with copper are typically somewhat greater than with nickel, however the applied potential results in increased background noise so that copper offers no signal-to-noise advantage over n...
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