En esta publicación se muestra el análisis voltamperométrico no como una técnica cuantitativa, si no que se utiliza la información voltamperométrica para poder determinar la coordinación y las propiedades de transferencia electrónica del Ni(II) a distinta acidez.

The coordination chem. of Ni(II) in the ionic liq. aluminum chloride : 1-ethyl-3-Me imidazolium chloride (EMIC) has been detd. using visible absorption spectrophotometry.  By dissolving nickel chloride (NiCl2) in Lewis acidic and basic ionic liqs. and observing the resultant spectra and voltammetric information, one can det. the coordination and electron-transfer properties of Ni(II) at the various acidities.  The optical data indicate the formation of tetrahedral NiCl42- in the ionic liq. with excess EMIC (basic melt, NAlCl3 < 0.5) with absorption maxima at 659 and 707 nm.  In acidic melts (NAlCl3 > 0.5), the wavelength of max. absorbance shifts to 462 nm.  This dramatic change in the visible spectrum is indicative of a change in the coordination of Ni(II) from tetrahedral (basic) to octahedral (acidic) geometry, changes which are mirrored in the cyclic voltammetry data of the same samples.  Studies in the neutral melt are also presented here. 

Parker, J. F.; Cheek, G. T.; Roeper, D. F.; O'Grady, W. E.

 ECS Transactions (2012), 41(36, Physical and Analytical Electrochemistry in Ionic Liquids 2), 23-33