Journal
ANALYTICAL CHEMISTRY
Volume 88, Issue 23, Pages 11931-11937Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.6b03837
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Funding
- National Natural Science Foundation of China [21301083, J1210001, 41472229]
- Specialized Research Fund for the Doctoral Program of Higher Education [20130211120032]
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An extremely high accumulation and retention of technetium in marine plants, especially brown seaweed, makes it a unique bioindicator of technetium. In the present work, a novel approach was developed for the speciation analysis of technetium in seaweed, wherein a series of biochemical separations was exploited to isolate different species of technetium. Inductively coupled plasma mass spectrometry (ICP-MS) was applied for the measurement of Tc-99 after thorough radiochemical preconcentration and purification. The results show that the distribution of technetium species in seaweed is relatively dispersive. Besides the inorganic species of TcO4-, most of technetium (>75%) combined with organic components of seaweed such as algin, cellulose, and pigment. This investigation could provide important fundamental knowledge for studying the processes and mechanisms of Tc-99 accumulation in the natural seaweed.
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