I want to analyze the radioactive trace content of leaf and rock sample. How do I prepare the leaf and rock samples before taking it to laboratory for analysis and which of the device (method) should I use for the analysis?
Thanks Mr. Wael M. Badawy. I wish to use sodium iodide thallium gamma spectrometry.
Dear Rilwan Usman ,
HPGe gamma spectroscopy should work better compared to NaI(Tl), due much to better energy resolution...
Please have a look at a recent discussion on that topic:
https://www.researchgate.net/post/Which-spectroscopy-do-you-prefer-NaTl-or-HPGe-detector.
With respect to the sample preparation; I would dry the sample and mill it in order to have a homogenous distribution of the trace content.
The answer of Dr wael badawy is complete. Nothing can be added to his answer. However, in case of using gamma ray spectroscopy, one will need a large quantity of the samples prepared. This will depend on the level of radioactivity. The lower the radioactivity, the larger the quantity samples needed.
How many gram of leafy and rocky samples do i need to prepare for NaI(Tl) gamma spectrometry analysis.
It depends which technique you would like to use. I suppose all this samples can just be collected putting in consideration of the geological structures and locations. The transfer them to lab for preparation. All of them have to be dried, puverize them for homogeneity and pack them in geometry for analyses.
If you plan to use ICP-MS, of course digestion is required using the necessary acids for analysis.
If you plan to utilize HPGe (NaI) detector, after packing them you should consider radioactive equilibrium, mostly 30 days of incubation.
For plant sample ,use nitric acid with H2O2
and for rock samples, HF with nitric a id and per chloric acid were used
this for ICP analysis
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