RESULTS Pertechnetate obtained by the liquid-liquid extrac lion. The  9@'Tc-
pertechnetateobtained from our au tomated methyl-ethyl-ketone extraction system has been …

In recent years there has been considerable in terest in the identities and quantities of
chemical as well as radioisotopic impurities in radiopharmaceutical quality 99mTcsolutions …

MATERIALS AND METHODS The [@ 9'c] pertechnetate used throughout this work was
obtained from our liquid-liquid extraction system and subjected to our test for the presence of …

ODmTc.. chelates. The chelates were ÂÂ@ Tc-gluconate prepared by electrolytic labeling,
OomTc_glucohepto@ nate prepared from a commercial freeze-dried kit which used …

MATERIALS AND METHODS Technetium-99m-Sn-gluconate was prepared as de scribed,
using a 10% Ca-gluconate solution that also contained 0.4% Ca-saccharate as the …

The 99 Tc-content in 99m Tc-pertechnetate separated from 99 Mo by distillation or extraction
has been studied with a plastic scintillation detector. The identification of the measured …

In a recent article," Chemical state of 99mTcin biomedicai products"(/NucÃ-Med 12: 596,
1971) the authors, Eckelman, Meinken, and Richards, con clude that" the technetium is …

either paper or silica gel thin-layer chromatography for the quality control of 9OmTc@
serumalbumin and 9OmTc.. DTpAHowever, Eckelman and Richards (2) have shown that a …

By using a cation-exchange distribution technique, the net charge of the technetium species
produced in the reduction of pertechnetate by stannous ion at ph:@ 2 has been determined …

IV and the VII oxidation states of technetium are the most stable in aqueous solution and that
various hydrolyzed forms of the reduced state are possible, as is the case for most transition …