The present work reports the voltammetric behavior of Zinc hexacyanoferrate (III) nanoparticles and their application in the detection of N-acetylcysteine. Two distinct ratios of water/formamide 10:0 (ZnH-1) and 4:6 (ZnH-2) were studied in the complexation reaction of Zn
A novel composite obtained from reaction of zirconium (IV) phosphated (ZrP) with Ag + and subsequent interaction of potassium hexacyanoferrate (III) (ZrPAgH) was prepared and characterized by infrared spectroscopy (FTIR) and cyclic voltammetry. The graphite paste electrode modified with ZrPAgH exhibited a cyclic voltammogram with a redox couple with midpoint potential E
This paper describes the interaction of a octa (3-chloropropyl)octasilsesquioxane (SS) functionalized with imidazole (SSI) groups, and its subsequent reaction with silver (AgSSI) and hexacyanoferrate (III) (AgHSSI). The materials SS, SSI were characterized by infrared (FTIR); solid state 13 C and 29 Si nuclear magnetic resonance (NMR). The AgSSI and AgHSSI were characterized by electronic (Uv-Vis) and infrared spectroscopy (FTIR). The AgHSSI was incorporated into a graphite paste electrode and the electrochemical studies were conducted with cyclic voltammetry. The AgSSI system was studied first, followed by the AgHSSI. The spectroscopic studies reveals that preparation was conducted with success.
A novel silsesquioxane and cobalt nitroprusside compound was prepared from octa(aminopropyl)silsesquioxane, resulting in a nanocomposite (ACCoN), which was then characterized by different spectroscopic techniques. The cyclic voltammograms of the ACCoN‐modified graphite paste electrode indicated a redox pair with a formal potential (Eθ′)=0.38 V, assigned to the Co(II)Fe(II)(CN)5NO/Co(II)Fe(III)(CN)5NO redox couple. The ACCoN‐modified graphite paste electrode was sensitive to isoniazid concentrations, presenting a linear response at a concentration range from 6.0×10−7 to 1.0×10−5 mol L−1, with limit of detection and amperometric sensitivity of 5.53×10−7 mol L−1 and 0.17 A/mol L−1, respectively.
In this work, the 3‐chloropropyl silica gel (SG) was prepared and organofunctionalized with 4‐amino‐5‐(4pyridyl)‐4H‐1,2,4‐triazole‐3‐thiol (SGA), that was characterized by infrared spectroscopy (FTIR) and cyclic voltammetry (CV). The cupric ions (Cu2+) sorption on the silica functionalized surface (CuSGA) were performed in aqueous solution, at room temperature. It was performed a systematic study about voltammetric behavior of CuSGA, where the cyclic voltammogram of graphite paste electrode modified with CuSGA exhibited a single redox pair with formal potential (Eθ′)=0.30 V assigned to the process Cu+/Cu2+, (KCl 1.0 mol L−1, v=20 mV s−1). The graphite paste electrode modified with CuSGA was sensitive to different concentrations of ascorbic acid and then an analytical curve could be constructed, with a linear response of 6.0×10−6 to 9.0×10−5 mol L−1 (R=0.9988) and a relative standard deviation of ±2.5 % (n=3). The detection limit (3σ) and amperometric sensitivity were 4.78×10−6 mol L−1 and 115.96 mA/mol L−1, respectively.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.