Multiple Stripping Research Articles

Determination of Trace Hydrophobic Volatiles in Aqueous Media by a Technique of Multiple Stripping and Trapping in a Closed Circuit

Abstract The double-sampling method of quantitative headspace-gas analysis was assayed by analysing model water-gas systems with benzene, toluene, ethylbenzene, n-decane, and n-dodecane as analytes. With this method, two headspace samples are withdrawn successively from the system and analysed by gas chromatography. The total initial contents of the analytes in the system are calculated by virtue of the decrease in their concentrations in the gaseous phase, brought about by the withdrawal of the first headspace sample. Combined with Grob's closed-loop strip/trap technique, the method provides for the determination of ppb (109) concentrations of the above hydrocarbons in water with an average relative error of several percent.

Differential potentiometric stripping analysis

Differential potentiometric stripping analysis, a sensitive instrumental modification of potentiometric stripping analysis, is described. For trace elements like cadmium and lead, which exhibit transport-controlled potentiometric stripping, signal enhancement is possible by employing a scheme involving multiple stripping and re-reduction of the preconcentrated analytes. For such elements the detection limit is below 5 × 10 -10 M with 60-s plating. The accuracy of the technique is tested on a biological reference material. Like potentiometric stripping analysis, the technique presented is not sensitive to reversible redox couples in solution.

Computerized electroanalysis : Multiple scanning anodic stripping and its application to sea water

the determination of copper, lead, zinc, cadmium and bismuth in standard sea water samples by multiple scanning anodic stripping has been investigated. The influence of plating potential and sample pH has been studied.

The deposition and stripping of thin films of silver at gold and platinum electrodes. A study of multiple deposition stripping current peaks

The deposition and stripping of thin films of silver at gold and platinum electrodes. A study of multiple deposition stripping current peaks

Stripping of heavy projectiles

The differential cross sections for the multiple stripping processes of heavy projectiles are given and discussed. Comparison with experimental data is given when the heavy projectiles are He 3, He 4 and Li 6 nuclei. Reasonable agreement between theoretical and experimental data is observed. In some cases an isotropic contribution from the compound nucleus mechanism is introduced to insure better agreement with experimental data.

Single and Multiple Stripping ofαParticles

Single and Multiple Stripping of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math>Particles

Single and Multiple Stripping ofαParticles

Assuming the stripping process to take place mainly at the nuclear surface, expressions are derived for the differential cross sections for the processes in which one, two, or three nucleons are stripped from an incident $\ensuremath{\alpha}$ particle by the target nucleus. Comparison between the derived formulas and experimental data was carried out for the (${\mathrm{He}}^{3}$, $p$) and ($\ensuremath{\alpha}, p$) reactions and shows fairly good agreement.

Total Cross Sections for Multiple Electron Stripping in Atomic Collisions at Energies to 100 kev

Total cross sections have been measured for electron capture and stripping of ${\mathrm{He}}^{+}$, ${\mathrm{Ne}}^{+}$, and ${\mathrm{A}}^{+}$ ions in single collisions of ${\mathrm{He}}^{+}$ on He, Ne, and A; ${\mathrm{Ne}}^{+}$ on Ne and A; and ${\mathrm{A}}^{+}$ on A. Where ${\mathrm{He}}^{+}$ ions are incident, the cross sections are given for electron capture, ${\ensuremath{\sigma}}_{10}$; for electron loss, ${\ensuremath{\sigma}}_{12}$; and for "elastic" scattering in excess of one degree, ${\ensuremath{\sigma}}_{11}&gt;1\ifmmode^\circ\else\textdegree\fi{}$. Where ${\mathrm{Ne}}^{+}$ and ${\mathrm{A}}^{+}$ are incident, the cross sections for multiple stripping ${\ensuremath{\sigma}}_{13}, \ensuremath{\cdots}, {\ensuremath{\sigma}}_{17}$ are given also. The measurements were made at 25, 50, and 100 kev and at additional energies in two cases where a maximum in the electron capture cross section was observed. Each total cross section was compiled by adding the contributions from the various angular regions into which the incident particle may be scattered. The contribution from the particles scattered between 0\ifmmode^\circ\else\textdegree\fi{} and 1\ifmmode^\circ\else\textdegree\fi{} was measured directly, while that for regions in excess of 1\ifmmode^\circ\else\textdegree\fi{} was obtained by integrating the measured differential cross sections. In the region between 1\ifmmode^\circ\else\textdegree\fi{} and 4\ifmmode^\circ\else\textdegree\fi{} the differential cross section for each process was measured with high resolution and these data are presented here separately. These differential measurements supplement data previously published for angles in excess of 4\ifmmode^\circ\else\textdegree\fi{}. Tables are presented showing the contribution of each of the angular regions to the various total cross sections. Large-angle scattering is found to make a significant contribution to the total cross sections for the production of the more highly ionized particles.