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  • 1 Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata, 700009 India
  • | 2 Department of Nuclear Medicine, Erasmus MC Rotterdam, Rotterdam, The Netherlands
  • | 3 Department of Radiation, Radionuclides and Reactors, Section RIH (Radiation and Isotopes in Health), Faculty of Applied Sciences, Technical University Delft, Mekelweg 15, 2629 JB Delft, The Netherlands
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The present article describes the probable speciation of 68Ga radionuclide just before labeling to DOTA peptides for PET imaging. The 68Ga eluted from an anion exchange column after its purification was analyzed for its elemental composition and pH at several stages. Neutron activation analysis of the eluted fractions yields the concentrations of Na and Cl, pH measurements indicate the concentration of free H+ ions in the medium and specific activity calculations indicate the concentration of 68Ga in the solution. Using all these information we get the idea of speciation of no carrier added Ga in the eluted fractions from CHEAQS programme. The estimations indicate that Ga is mostly present as GaCl2+ in the total MiliQ eluate. However, just before labeling of DOTA the pH of the Ga-containing eluate is adjusted to ~3.5 using HEPES buffer and at that condition Ga remains as Ga3+ species which is responsible for a successful and efficient labeling. The MilliQ eluate collected before actual labeling was estimated for trace elements using inductively coupled plasma atomic emission spectrometry was found to contain a few ppb of Al, Co, Pd and Pt that did not interfere in the actual labeling. A clear idea about the prerequisite of 68Ga species before labeling to a peptide might be of special interest for its judicious application as a radiopharmaceutical.

Manuscript Submission: HERE

  • Impact Factor (2019): 1.137
  • Scimago Journal Rank (2019): 0.360
  • SJR Hirsch-Index (2019): 65
  • SJR Quartile Score (2019): Q3 Analytical Chemistry
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  • SJR Quartile Score (2019): Q3 Radiology, Nuclear Medicine and Imaging
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  • Impact Factor (2018): 1.186
  • Scimago Journal Rank (2018): 0.408
  • SJR Hirsch-Index (2018): 60
  • SJR Quartile Score (2018): Q2 Nuclear Energy and Engineering
  • SJR Quartile Score (2018): Q2 Pollution

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
per Year
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Founder Akadémiai Kiadó
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)