جستجوی مقالات مرتبط با کلیدواژه "خمیرکربن" در نشریات گروه "شیمی"

In this approach، functionalized carbon nanoparticles have been applied as modifier for determination of phenylephrine. The significant increase in voltammetric responses for pre-adsorbed phenylephrine compare with those for solution confirms high affinity of phenylephrine to carbon nanoparticles (possibly due to π-π stacking interaction between aromatic rings of phenylephrine and surface-sulfonated carbon nanoparticles). To obtain the optimum of adsorption conditions، the effects of pH، agitation rate، and adsorption time are investigated. Differential pulse voltammetry was applied for quantitative determination of phenylephrine. The dynamic linear range 8. 0×10-6-8. 0×10-5 mol L-1 and the limit of detection 9. 5×10-7 mol L-1 was obtained. Determination of phenylephrine in biological sample was performed successfully.

In this approach، hierarchically structured cobalthas been applied as modifier for determination of acetaminophen. These nanostructures have been synthesized using a chemical reduction method. They were characterized by scanning electron microscopy and cyclic voltammetry. The modified electrode exhibits an electrocatalytic activity toward oxidation of acetaminophen. The effect of pH and scan rate has been studied. Differential pulse voltammetry has been used for quantitative determination af acetaminophen. A dynamic linear range 1×10-3Mto 1×10-6M with a limit of detection 5× 10-7 M obtained. The modified electrode has been successfully applied for determination of acetaminophen in synthetic serum and commercial tablets.