Table 1 Isolation yields of 211At using Te columns in the presence or absence of SnCl2 in the loading mixturea.

From: Investigation of a tellurium-packed column for isolation of astatine-211 from irradiated bismuth targets and demonstration of a semi-automated system

Loading solution

% Captured by

Te column

% Activity in

HCl wash

(20 mL)

% Activity in

H2O wash

(20 mL)

%211At eluted in 1st

1 mL NaOH

(decay-corrected)

1.5 M HCl

>99.9

<0.1

<0.1

78.9–87.7

0.1 M SnCl2 in 6 M HCl

99.5

<0.1b

<0.1

75

  1. a35% aqueous NH2OH⋅HCl was added until the cessation of bubbling. bThe Te column was eluted with 20 mL of 0.1 M SnCl2 in 6 M HCl, followed by 20 mL of 6 M HCl.
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