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@ARTICLE{Shehata:14411,
      author       = {Shehata, M.M. and Scholten, B. and Spahn, I. and Coenen,
                      H.H. and Qaim, S.M.},
      title        = {{S}eparation of radioarsenic from irradiated germanium
                      oxide targets for the production of (71){A}s and (72){A}s},
      journal      = {Journal of radioanalytical and nuclear chemistry},
      volume       = {287},
      issn         = {0236-5731},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {PreJuSER-14411},
      pages        = {435 - 442},
      year         = {2011},
      note         = {M. Shehata is grateful to the Accelerators and Ion Sources
                      Department, Nuclear Research Center, Egyptian Atomic Energy
                      Authority, Cairo, Egypt for a scholarship tenable at the
                      Forschungszentrum Julich and the University of Cologne,
                      Germany. All authors thank the operators of the COSY and
                      Baby Cyclotron at Julich for performing the irradiations and
                      S. Spellerberg for technical assistance. The authors also
                      thank the Central Department for Chemical Analysis of the
                      Forschungszentrum Julich for analysis of the samples.},
      abstract     = {A method for the separation of no-carrier-added arsenic
                      radionuclides from the bulk amount of proton-irradiated GeO2
                      targets as well as from coproduced radiogallium was
                      developed. The radionuclides Ge-69 and Ga-67 produced during
                      irradiation of GeO2 were used as tracers for Ge and Ga in
                      the experiments. After dissolution of the target the ratio
                      of As(III) to As(V) was determined via thin layer
                      chromatography (TLC). The extraction of radioarsenic by
                      different organic solvents from acid solutions containing
                      alkali iodide was studied and optimized. The influence of
                      the concentration of various acids (HCl, HClO4, HNO3, HBr,
                      H2SO4) as well as of KI was studied using cyclohexane. The
                      optimum separation of radioarsenic was achieved using
                      cyclohexane with 4.75 M HCl and 0.5 M KI and its
                      back-extraction with a $0.1\%$ H2O2 solution. The separation
                      leads to high purity radioarsenic containing no radiogallium
                      and < $0.001\%$ [Ge-69]Ge. The overall radiochemical yield
                      is 93 +/- A $3\%.$ The practical application of the
                      optimized procedure in the production of As-71 and As-72 is
                      demonstrated and batch yields achieved were in the range of
                      $75-84\%$ of the theoretical values.},
      keywords     = {J (WoSType)},
      cin          = {INM-5},
      ddc          = {540},
      cid          = {I:(DE-Juel1)INM-5-20090406},
      pnm          = {Funktion und Dysfunktion des Nervensystems (FUEK409) /
                      89573 - Neuroimaging (POF2-89573)},
      pid          = {G:(DE-Juel1)FUEK409 / G:(DE-HGF)POF2-89573},
      shelfmark    = {Chemistry, Analytical / Chemistry, Inorganic $\&$ Nuclear /
                      Nuclear Science $\&$ Technology},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000286332100010},
      doi          = {10.1007/s10967-010-0699-x},
      url          = {https://juser.fz-juelich.de/record/14411},
}