The labeling yield is about 45% using sodium ascorbate as reductant;
采用抗坏血酸钠为还原剂时，标记率为45％；
The simulative labeling yield was tested by UV-spectrophotometer and calculated as 80.4%.
采用紫外分光光度计测试吸光度并计算出模拟标记率达80.4%。
It is concluded that labeling yield of 131i-salidroside was high and the radioiodinated salidroside was stable, but its uptake in neuroblast was little.
结论是，碘标红景天苷标记率高，标记物稳定；神经母细胞对131i -红景天苷基本无摄取。
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