The electrochemical reduction behaviour of Permethrin has been carried out, by employing d.c. polarography, cyclic voltammetry (CV) and differential pulse polarography (DPP) in the supporting electrolytes of the pH ranging from 2.0 to 12.0. The nature of electrode process was studied, the number of electrons was evaluated and the reduction mechanism was proposed. Kinetic parameters such as tran...

Polarographie reduction of adenine and cytosine moieties in denatured DNA was followed by means of differential (derivative) pulse polarography. The measurements of the reduction currents yielded by samples of denatured DNA differing in guanine+cytosine (G + C) content showed that both cytosine and adenine residues were reduced in DNA in the pH range of 6.0 —8.7. The con­ tribution of their red...

Cyclohexylidine-ammonium-2-aminocyclohexyline-l-cyclohexee-l- dithiocarboxylate (CCCD) is employed for the gravimetric determination of Ni (II). In neutral or ammoniacal solutions, the metal forms a violet precipitate with the reagent which can be weighed as Ni (C13H18NS2)a2f ter drying at 115 - 120?C Using this procedure, the nickel content of steel samples can also be determined accurate...

Essential to the renewal of interest in polarography and voltammetry in the 1970s were the availability of reliable polarographs offering the pulse mode, with sensitivity down to lo-‘-lo-* M and h’gh 1 er resolving power; a better understanding of the electrode processes of compounds of pharmaceutical interest (active agents, excipients, additives, antioxidants, etc.); and the application of ox...