Differential pulse voltametry

The electrochemical behaviour of trace concentrations of triphenylstannyl acetate, using a mercury film-glassy carbon electrode, was investigated by various measuring methods cyclic voltametry, differential pulse voltametry and controlled-potential electrolysis. Determination by DPASV (differential pulse ASV) of water and fish samples has LOD 2.5 nM98. 

KROGER s, TURNER A P, mosbach K and HAUPT K (1999), Imprinted polymer-based sensor system for herbicides using differential-pulse voltametry on screen-printed electrodes , Anal Chem, 71, 3698-3702. 

The oxidation processes shown in reactions 4 and 5 are the basis for differential pulse polarography/cyclic voltametry determination of dialkyllead and trialkyllead species135. 

AG Fogg, AA Barros, JO Cabral. Differential-pulse adsorptive stripping voltametry of food and cosmetic synthetic colouring matters and their determination and partial identification in tablet coating and cosmetics. Analyst 111 831—835, 1986. 

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). 

Figure 7.11. DPASV (differential pulse anodic stripping voltametry) polarograms obtained for the exudate solutions obtamed from either Fe-deficient (-Fe) or Fe-sufficient (4- Fe) ryegrass Lolium perenne ). at two levels of addition of Cu (0.14 and 0.71 xM). The dashed line indicates the electric potential corresponding to the labile Cu species (presumably dominated by Cu- ) that was obtained in the Cu solution without exudates (0.011 V). The shift of the peak toward more negative electric potential values and lower intensities is indicative of increasing complexahon of Cu with decreasing Cu concentrations and increasing phytosiderophore secretion as a result of Fe deficiency. (Adapted from Thomas et al., 2005.)...

Duinker, J.C. and Kramer, C.J.M., 1977. An experimental study on the speciation of dissolved zinc, cadmium, lead and copper in river Rhine and North Sea water, by differential pulsed anodic stripping voltametry. Mar. Chem., 5 207—228. 

Franke, J.P. and Zeeuw, R.A. (1976) Differential pulse anodic stripping voltametry as a rapid screening technique for heavy metal intoxications. Arch. Toxicol., 37, 47-55. 

Electrothermal vaporization isotopa dilution inductively coupled plasma mass spectrometry (ETV-ID-ICP-MS) has been utilized for the analysis of cadmium in fish samples. Radiochemical neutron activation analysis (RNAA), differential pulse anodic stripping voltametry (ASV) and the calorimetric dithizone method may also be employed. The AAS techniques appear to be most sensitive, with cadmium recoveries ranging from 94 to 109% (Koplan, 1999). 

In real samples, the voltammetric responses of differential pulse anodic stripping voltametry have been applied to investigate the Cd-binding properties in MLPs from mussels. The existence of two different Cd-MLP complexes was thus demonstrated. 

Anodic stripping voltammetry, potentiometric stripping voltametry, and differential pulse polarography are used for the simultaneous determination of up to 10 analytes at extremely low concentrations (detection limits <0.01 pgl ). Electroanalytical techniques are applicable for 30 elements. Stripping analysis allows differentiation between chemical forms but is subject to interference from adsorption... 

The process at lie corresponds to the reduction of complexed Cu(I) to uncomplexed Cu(0) and free neutral adenine. While it is not clearly apparent from either differential pulse or cyclic voltametry, spectro-electrochemistry provides evidence that the copper centers in the dimeric complex may be reduced separately and the broad peak at -0.2 V may consist of overlapping peaks. Upon reduction at -0.4 V, band broadening monitored at 305 nm and charge transfer bands around 343 nm decrease, current reaches a minimum, and there are no further spectral changes. Copper is present on the electrode but the adenine peak remains split. Cyclic voltam-mograms of the reduced solution show a clearly defined peak at Epc =... 

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