Square-wave voltammetry adsorption

The effect of the volume and the surface catalytic reaction is sketched in Figs. 2.80 and 2.81, respectively. Obviously, the voltammetric behavior of the mechanism (2.188) is substantially different compared to the simple catalytic reaction described in Sect. 2.4.4. In the current mechanism, the effect of the volume catalytic reaction is remarkably different to the surface catalytic reaction, revealing that SWV can discriminate between the volume and the surface follow-up chemical reactions. The extremely high maxima shown in Fig. 2.81 correspond to the exhaustive reuse of the electroactive material adsorbed on the electrode surface, as a consequence of the synchronization of the surface catalytic reaction rate, adsorption equilibria, mass transfer rate of the electroactive species, and duration of the SW potential pulses. These results clearly reveal how powerful square-wave voltammetry is for analytical purposes when a moderate adsorption is combined with a catalytic regeneration of the electroactive material. This is also illustrated by a comparative analysis of the mechanism (2.188) with the simple surface catalytic reaction (Sect. 2.5.3) and the simple catalytic reaction of a dissolved redox couple (Sect. 2.4.4), given in Fig. 2.82. 

A theoretical model of square-wave voltammetry (SWV) combined with adsorptive accumulation of reactant was presented [48]. 

Application of adsorptive stripping analysis to the determination of nucleic acids at mercury electrodes has also been reported [195]. Tomschik etal. [196] have studied reduction and oxidation of peptide nucleic acid and DNA at mercury and carbon electrodes. The authors have utilized cyclic and square-wave voltammetries to study reduction and oxidation signals of single-stranded peptide nucleic acid and DNA decamers and pentadecamers. 

Lovric M (2002) Theory of square-wave voltammetry of a reversible redox reaction complicated by the reactant adsorption. Electroanalysis 14 405-414. 

Adsorptive accumulation on glassy carbon electrodes from 1 M HCIO4 solutions was used to detect the phytotoxin cercosporin 18 (CER cf. Section 13.11.3.1) from infected leaf tissues, and the adsorptive square wave voltammetry was employed to perform the quantitative determination of CER in naturally infected extracts <2003ELA40, 2005ANA199>. 

Electrochemical measurements have been developed by using different electrochemical techniques (differential pulse voltammetry (DPV), cyclic voltametry (CV), potentiometric stripping analysis (PSA), square wave voltammetry (SWV), adsorptive stripping transfer voltammetry (ASTV), etc.). The abbreviations given in covalent attachment of DNA onto different transducers are water soluble carbodimide l-(3-dimethyaminopropyl)-3-ethyl-carbodimide (EDC), IV-hydroxysuccimide (NHS), mercaptohexanol (MCH), aminoethanethiol (AET), mercaptosilane (MSi), and N-cyclohexyl-lV -[2-(N-methylmorpholino)-ethyl]carbodimide-4-tolune sulfonate (CDS). 

Microfluidic chip devices are also shown to be attractive platforms for performing microscale voltammetric analysis and for integrating voltammetric procedures (linear-sweep, square-wave and adsorptive-stripping voltammetry) with on-chip chemical reactions and fluid manipulations [97]. 

Jelen, F. Fojta, M. Palecek, E. Adsorptive stripping square-wave voltammetry of DNA. J. Electroanal. Chem. 1997, 427, 49-56. 

Masarik M, Kizek R, Kramer K), et al. Application of avidin-biotin technology and adsorptive transfer stripping square-wave voltammetry for detection of DNA hybridization and avidin in transgenic avidin maize. Anal. Chem., 2003 75(11) 2663-2669. 

Wang, J., Bollo, S., Paz, J. L. L., Sahlin, E., Mukherjee, B. (1999). Ultratrace measurements of nucleic acids by baseline-corrected adsorptive stripping square-wave voltammetry. AwaZ C/iem 71, 1910-1913. 

Galeano Diaz, T., Guiberteau, A., Lopez Soto, M.D., and Ortiz, J.M. Determination of copper with 5,5-dimethylcyclohexane- 1,2,3-trione 1,2-dioxime 3-thiosemicarbazone in oUve oUs by adsorptive stripping square wave voltammetry. Food Chemistry, 96(1), 156-162. 2006. 

Adsorptive Stripping Square-Wave Voltammetry of Pharmaceutical... 

ADSORPTIVE STRIPPING SQUARE WAVE VOLTAMMETRY OF PHARMACEUTICAL QUINONIC DERIVATIVES... 

P. Daneshgar, P. Norouzi, M.R. Ganjali, Rapid determination of bisacodyl in flow injection system combination by a novel sensitive adsorptive square-wave voltammetry. Sens. Actuators B Chem. 136 (2009) 66-72. 

Distinguish between (a) voltammetry and amperometry, (b) linear-scan voltammetry and pulse voltammetry, (c) differential-pulse voltammetry and square-wave voltammetry, (d) an RDE and a ring-disk electrode, (e) faradaic impedance and double-layer capacitance, (f) a limiting current and a diffusion current, (g) laminar flow and turbulent flow, (h) the standard electrode potential and the half-wave potential for a reversible reaction at a working electrode, (i) normal stripping methods and adsorptive stripping methods. 

Airado, D., Galeano, T. and Durin, I. (2010) Determination of trans-resveratrol in red wine by adsorptive stripping square-wave voltammetry with medium exchange. Food Chem., 122,1320-1326. 

---