Incorporating spectroscopic on-line monitoring as a method of detection for a Lewis cell setup.

Autor: Heller FD; Pacific Northwest National Laboratory, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA. sam.bryan@pnnl.gov and Washington State University, Department of Chemistry, PO Box 644630, Pullman, WA 99164-4630, USA., Casella AJ; Pacific Northwest National Laboratory, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA. sam.bryan@pnnl.gov., Lumetta GJ; Pacific Northwest National Laboratory, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA. sam.bryan@pnnl.gov., Nash KL; Washington State University, Department of Chemistry, PO Box 644630, Pullman, WA 99164-4630, USA., Sinkov SI; Pacific Northwest National Laboratory, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA. sam.bryan@pnnl.gov., Bryan SA; Pacific Northwest National Laboratory, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99352, USA. sam.bryan@pnnl.gov.
Jazyk: angličtina
Zdroj: The Analyst [Analyst] 2017 Jul 07; Vol. 142 (13), pp. 2426-2433. Date of Electronic Publication: 2017 Jun 07.
DOI: 10.1039/c7an00351j
Abstrakt: A Lewis cell was designed and constructed for investigating solvent extraction systems by spectrophotometrically monitoring both the organic and aqueous phases in real time. This new Lewis cell was tested and shown to perform well compared to other previously reported Lewis cell designs. The advantage of the new design is that the spectroscopic measurement allows determination of not only metal ion concentrations, but also information regarding chemical speciation - information not available with previous Lewis cell designs. For convenience, the new Lewis cell design was dubbed COSMOFLEX (COntinuous Spectroscopic MOnitoring of Forrest's Liquid-liquid EXtraction cell). After construction performance testing was done for establishing the ideal stir speed range, UV-Vis measured concentration and D value determination. Each one of these tests was satisfactorily passed.
Databáze: MEDLINE
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