Labeling of Tannic Acid with Technetium-99m for Diagnosis of Stomach Ulcer

Table 1

Effect of time on the stability of ^99mTc-tannic acid.

Time after labeling (h)	% Labeled compound	% Free ^99mTc	% Colloid
1 h	95.5 ± 0.52	2.5 ± 0.05	2.0 ± 0.05
2 h	95.1 ± 0.25	2.7 ± 0.25	2.2 ± 0.05
6 h	95.2 ± 0.25	2.8 ± 0.25	2.0 ± 0.45
12 h	94.7 ± 0.50	2.9 ± 0.25	2.1 ± 0.50
24 h	94.5 ± 0.30	2.1 ± 0.15	3.2 ± 0.35

Values represent the mean ± SEM 𝑛=6.