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- W2076013647 abstract "ABSTRACT The partitioning behavior of technetium has been investigated in polyethylene glycol (PEG)-based aqueous biphasic systems using K3P04, K2C03, Na3(citrate), (NH4) 3(citrate), (NH4) 2S04, and NaOH as biphase-forming salts, and PEGs with average molecular weights of 1500, 2000, 3400, and 6000. Pertechnetate quantitatively partitions to the PEG-rich phase in these systems. The distribution ratios increase with increasing salt or PEG concentration used to form the aqueous biphasic systems, consistent with the increasing phase incompatibility. At a given concentration of salt and PEG, DTc values in the various systems increase in the order NaOH < (NH4) 2S04 < (NH4)3(citrate) < K2C03 < K3P04 and PEG-1500 < PEG-2000 < PEG-3400 < PEG-6000. The distribution ratios are lower at very high or very low pH values than they are in the 3-9 pH range. Matrix ions may also influence the DTcvalues by affecting the aqueous biphasic system composition. Technetium can be stripped from the loaded PEG-rich phase by contact with a clean salt solution containing SnCl2, which reduces TcO4 to an oxy-chloro cationic species that partitions to the salt-rich phase." @default.
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- W2076013647 date "1995-07-01" @default.
- W2076013647 modified "2023-09-24" @default.
- W2076013647 title "SELECTIVE AND QUANTITATIVE PARTITIONING OF PERTECHNETATE IN POLYETHYLENE-GLYCOL BASED AQUEOUS BIPHASIC SYSTEMS" @default.
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- W2076013647 doi "https://doi.org/10.1080/07366299508918297" @default.
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