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Title of Journal: J Radioanal Nucl Chem

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Abbravation: Journal of Radioanalytical and Nuclear Chemistry

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Springer Netherlands

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DOI

10.1002/pssb.19690330117

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ISSN

1588-2780

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Detection of additional impurities in the UVchrom

Authors: C Pascali A Bogni C Cucchi L Laera O Crispu G Maiocchi F Crippa E Bombardieri
Publish Date: 2011/02/12
Volume: 288, Issue: 2, Pages: 405-409
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Abstract

Samples of lSmethyl11Cmethionine prepared by oncolumn 11Cmethylation on a C18 cartridge were analyzed by HPLC under different conditions in order to explain some anomalies observed in the UVchromatograms By so doing two new unlabelled impurities were found and identified as iodide and homocystine Their amounts are still compatible with the safe human use of the radiotracer solution Nevertheless if needed iodide can be totally removed by elution through an anionexchange resin while homocystine can be reduced by either decreasing the amount of precursor used in the synthesis or preventing its air oxidation

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