@article{PaulssenLengkeekLeetal.2016,
  author    = {Paulßen, Elisabeth and Lengkeek, Nigel A. and Le, Van So and Pellegrini, Paul A. and Greguric, Ivan and Weiner, Ron},
  title     = {The role of additives in moderating the influence of Fe(III) and Cu(II) on the radiochemical yield of [⁶⁸Ga(DOTATATE)]},
  series = {Applied Radiation and Isotopes},
  volume    = {107},
  journal   = {Applied Radiation and Isotopes},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1872-9800},
  doi       = {10.1016/j.apradiso.2015.09.008},
  pages     = {13 -- 16},
  year      = {2016},
  abstract  = {[⁶⁸Ga(DOTATATE)] has demonstrated its clinical usefulness. Both Fe³⁺ and Cu²⁺, potential contaminants in Gallium-68 generator eluent, substantially reduce the radiochemical (RC) yield of [⁶⁸Ga(DOTATATE)] if the metal/ligand ratio of 1:1 is exceeded. A variety of compounds were examined for their potential ability to reduce this effect. Most had no effect on RC yield. However, addition of phosphate diminished the influence of Fe³⁺ by likely forming an insoluble iron salt. Addition of ascorbic acid reduced Cu²⁺ and Fe³⁺ to Cu⁺ and Fe²⁺ respectively, both of which have limited impact on RC yields. At low ligand amounts (5 nmol DOTATATE), the addition of 30 nmol phosphate (0.19 mM) increased the tolerance of Fe3⁺ from 4 nmol to 10 nmol (0.06 mM), while the addition of ascorbic acid allowed high RC yields (>95\%) in the presence of 40 nmol Fe³⁺ (0.25 mM) and 100 nmol Cu²⁺ (0.63 mM). The effect of ascorbic acid was highly pH-dependant, and gave optimal results at pH 3.},
  language  = {en}
}
@article{PaulssenLeLengkeeketal.2013,
  author    = {Paulßen, Elisabeth and Le, Van So and Lengkeek, Nigel and Pellegrini, Paul and Jackson, Tim and Greguric, Ivan and Weiner, Ron},
  title     = {Influence of Metal Ions on the 68Ga-labeling of DOTATATE},
  series = {Applied Radiation and Isotopes},
  volume    = {82},
  journal   = {Applied Radiation and Isotopes},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1872-9800},
  doi       = {10.1016/j.apradiso.2013.08.010},
  pages     = {232 -- 238},
  year      = {2013},
  language  = {en}
}