Differential adsorption

Electrochemical preconcentration can be achieved in the following two different ways, depending on whether differential pulse stripping voltammetry (differential pulse ASV) or adsorption differential pulse voltammetry has been applied. 

ADPV Adsorption differential pulse voltammetry SETAAS slurry ETAAS SDCP direct slurry DCP... 

ADPCSV Adsorptive differential pulse cathodic stripping voltammetry... 

Equilibrium vapor pressure of bulk liquid Relative pressure, p/p 0 Statistical mechanical partition function Density in molecules/cubic centimeter Gas constant per mole Number of moles of adsorbed gas Number of moles of adsorbent Isosteric heat of adsorption Differential heat of adsorption Isothermal heat of adsorption Adiabatic heat of adsorption... 

Pressure change due to an induced volume change Rate constant of any first-order adsorption, also equal to cuo Rate constant for the ith type of adsorption Differential number of sites... 

Methods for quantitative analysis of Co indude flame and graphite-furnace atomic absorption spectrometry (AAS e.g., Welz and Sperling 1999), inductively coupled plasma emission spectrometry (ICP-AES e.g., Schramel 1994), neutron activation analysis (NAA e.g., Versieck etal. 1978), ion chromatography (e.g., Haerdi 1989), and electrochemical methods such as adsorption differential pulse voltammetry (ADPV e.g., Ostapczuk etal. 1983, Wang 1994). Older photometric methods are described in the literature (e.g.. Burger 1973). For a comparative study of the most commonly employed methods in the analysis of biological materials, see Miller-Ihli and Wolf (1986) and Angerer and Schaller... 

L. Ilcheva and K. Cammann, Flow Injection Analysis of Chloride in Tap and Sewage Water Types by Adsorption Differential Pulse Voltammetry. Fresenius Z. Anal. Chem., 322 (1985) 323. 

Chromatography - A method for separation of the components of a sample in which the components are distributed between two phases, one of which is stationary while the other moves. In gas chromatography the gas moves over a liquid or solid stationary phase. In liquid chromatography the liquid mixture moves through another liquid, a solid, or a gel. The mechanism of separation of components may be adsorption, differential solubility, ion-exchange, permeation, or other mechanisms. [6]... 

Gammelgaard, B. and Andersen, J.R. (1985). Determination of nickel in human nails by adsorption differential-pulse voltammetry. Analyst, 110,1197. 

This book describes the applications of important new NMR spectroscopic methods to a variety of useful materials and compares them with results from other techniques such as adsorption, differential scanning calorimetry, thermally stimulated depolarization cmrent, dielectric relaxation spectroscopy, infrared spectroscopy, optical microscopy, and small-angle and wide-angle x-ray scattering. The text explores the application of NMR spectroscopy to examine interfacial phenomena in objects of increasing complexity, beginning with immodified and modified silica materials. It then describes properties of various mixed oxides with comparisons to individual oxides and also describes carbon materials such as graphite and carbon nanotubes. 

L. Fernandez-Llano, M.C. Blanco-Lopez, M.J. Lobo-Castanon, A.J. Miranda-Ordieres and P. Tunon-Blanco, Determination of diclofenac in urine samples by molecularly-imprinted solid-phase extraction and adsorptive differential pulse voltammetry. Electroanalysis, 19 (15) 1555-1561,2007. 

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