Neutron Polarization Analysis for Biphasic Solvent Extraction Systems

Motokawa, Ryuhei; Endo, Hitoshi; Nagao, Michihiro; Heller, William T.

doi:10.1080/07366299.2016.1201980

Title: Neutron Polarization Analysis for Biphasic Solvent Extraction Systems

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Abstract

Here we performed neutron polarization analysis (NPA) of extracted organic phases containing complexes, comprised of Zr(NO₃)₄ and tri-n-butyl phosphate, which enabled decomposition of the intensity distribution of small-angle neutron scattering (SANS) into the coherent and incoherent scattering components. The coherent scattering intensity, containing structural information, and the incoherent scattering compete over a wide range of magnitude of scattering vector, q, specifically when q is larger than q* ≈ 1/R_g, where R_g is the radius of gyration of scatterer. Therefore, it is important to determine the incoherent scattering intensity exactly to perform an accurate structural analysis from SANS data when R_g is small, such as the aforementioned extracted coordination species. Although NPA is the best method for evaluating the incoherent scattering component for accurately determining the coherent scattering in SANS, this method is not used frequently in SANS data analysis because it is technically challenging. In this study, we successfully demonstrated that experimental determination of the incoherent scattering using NPA is suitable for sample systems containing a small scatterer with a weak coherent scattering intensity, such as extracted complexes in biphasic solvent extraction systems.

Authors:

Motokawa, Ryuhei ^[1]; Endo, Hitoshi ^[2]; Nagao, Michihiro ^[3]; Heller, William T. ^[4]

Japan Atomic Energy Agency (JAEA), Tokai (Japan). Materials Research Center
High Energy Accelerator Research Organization (KEK), Tsukuba (Japan); Graduate Univ. for Adanced Studies (SOKENDAI), Ibaraki (Japan)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Exploration of Energy and Matter; Indiana Univ., Bloomington, IN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Thu Jun 16 00:00:00 EDT 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1319185

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Solvent Extraction and Ion Exchange

Additional Journal Information:: Journal Volume: 34; Journal Issue: 5; Journal ID: ISSN 0736-6299

Publisher:: Taylor and Francis

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Neutron polarization analysis; solvent extraction; tri-n-butyl phosphate

Citation Formats


                    Motokawa, Ryuhei, Endo, Hitoshi, Nagao, Michihiro, and Heller, William T. Neutron Polarization Analysis for Biphasic Solvent Extraction Systems.  United States: N. p., 2016. 
Web.  doi:10.1080/07366299.2016.1201980.

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                    Motokawa, Ryuhei, Endo, Hitoshi, Nagao, Michihiro, & Heller, William T. Neutron Polarization Analysis for Biphasic Solvent Extraction Systems.  United States.  https://doi.org/10.1080/07366299.2016.1201980

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                    Motokawa, Ryuhei, Endo, Hitoshi, Nagao, Michihiro, and Heller, William T. Thu .  
"Neutron Polarization Analysis for Biphasic Solvent Extraction Systems".  United States.  https://doi.org/10.1080/07366299.2016.1201980.  https://www.osti.gov/servlets/purl/1319185.

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@article{osti_1319185,

  title        = {Neutron Polarization Analysis for Biphasic Solvent Extraction Systems},

  author       = {Motokawa, Ryuhei and Endo, Hitoshi and Nagao, Michihiro and Heller, William T.},

  abstractNote = {Here we performed neutron polarization analysis (NPA) of extracted organic phases containing complexes, comprised of Zr(NO3)4 and tri-n-butyl phosphate, which enabled decomposition of the intensity distribution of small-angle neutron scattering (SANS) into the coherent and incoherent scattering components. The coherent scattering intensity, containing structural information, and the incoherent scattering compete over a wide range of magnitude of scattering vector, q, specifically when q is larger than q* ≈ 1/Rg, where Rg is the radius of gyration of scatterer. Therefore, it is important to determine the incoherent scattering intensity exactly to perform an accurate structural analysis from SANS data when Rg is small, such as the aforementioned extracted coordination species. Although NPA is the best method for evaluating the incoherent scattering component for accurately determining the coherent scattering in SANS, this method is not used frequently in SANS data analysis because it is technically challenging. In this study, we successfully demonstrated that experimental determination of the incoherent scattering using NPA is suitable for sample systems containing a small scatterer with a weak coherent scattering intensity, such as extracted complexes in biphasic solvent extraction systems.},

  doi          = {10.1080/07366299.2016.1201980},

  journal      = {Solvent Extraction and Ion Exchange},

  number       = 5,

  volume       = 34,

  place        = {United States},

  year         = {Thu Jun 16 00:00:00 EDT 2016},

  month        = {Thu Jun 16 00:00:00 EDT 2016}

}

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