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

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Cobalt pentacyanonitrosylferrate on the aminopropylsilica silica gel surface (SiCoNP) was previously prepared following two steps. The electrochemical behavior of SiCoNP modified electrode showed two redox couples, the first and second redox couples were observed at anodic potential (Epa) 1 = 0.36 and 0.60 V vs. Ag/AgCl attributed to the oxidation of Co (II) to Co (III) and Fe (II) (CN) 5 NO/Fe (III) (CN) 5 NO, respectively. The modified carbon paste electrode with SiCoNP was tested in the hydrazine electrooxidation. In the hydrazine electrooxidation, the H + release was observed and the two metal centers are involved in this process. The proposed mechanism has been described and based on studies of the effect of hydrogen ion concentration in the redox process of bivalent compound formed. Thus a large increase in hydrogen ion concentration promotes the formation of an intermediate electroactive species with an anodic peak at 0.56 V. The nature of this species is not well established but may be related to protonation of cyanide or NO groups present. The modified graphite paste electrode presented a limit of detection of 2.38×10 -4 mol L -1 and amperometric sensitivity of 1.37×10 -6 A.mol -1 .L.

This paper describes a voltammetric study of cadmium nitroprusside synthesized from different compositions of water/formamide in your reaction of Cd 2+ with [Fe III (CN)5NO] 2-(CdNP). After infrared and transmission electron microscopy characterization, the CdNP was incorporated into a carbon paste electrode and a systematic voltammetric study was performed for four systems (CdNP-1, CdNP-2, CdNP-3 and CdNP-4). The spectroscopic studies reveals that all preparations was conducted with success. The cyclic voltammogram of all CdNP particles obtained from a carbon paste electrode modified (10% m/m) exhibited a redox couple with formal potential (E θ') = 0.63 ± 0.02 V (10 % (m/m); =20 mV s-1 ; KNO3 1.0 M)) attributed to the redox process [Fe II (CN)5NO]/[Fe III (CN)5NO] in the presence of Cd 2+ .