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Determination of rare earth elements, uranium and thoriumin soil samples by microwave-assisted acid digestionand inductively coupled plasma mass spectrometry |
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| รหัสดีโอไอ | |
| Creator | 1. Sasikarn Nuchdang 2. Ratchai Fungklin 3. Wilasinee Kingkam 4. Dussadee Rattanaphra |
| Title | Determination of rare earth elements, uranium and thoriumin soil samples by microwave-assisted acid digestionand inductively coupled plasma mass spectrometry |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2021 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 43 |
| Journal No. | 6 |
| Page no. | 1716-1725 |
| Keyword | rare earth elements, microwave-assisted acid digestion, inductively coupled plasma mass spectrometry, soil sample |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | This paper presents a simple microwave digestion method for soil samples leading to correct determination of the rareearth elements (Ce, La, Nd, Sc), uranium (U) and thorium (Th) using inductively coupled plasma mass spectrometry (ICP-MS).Six soil samples were collected from different depths (0-0.1, 0.1-0.3, 0.3-1.0, 1.0-2.0, 2.0-3.0 and 5.0-8.0 m) in Phuket province,Thailand. The samples were decomposed using microwave-assisted acid digestion at four different acid conditions including (I)20 mL concentrated nitric acid; (II) 20 mL concentrated hydrochloric acid; (III) mixture of 8 mL nitric acid and 12 mLhydrochloric acid; and (IV) mixture of 12 mL nitric acid and 8 mL hydrochloric acid. Instrumental neutron activation analysis(INAA) was also applied for determination of REEs, U and Th in those soil samples to compare the results. It was found that theconcentrations of Ce, La, Nd, Sc, U and Th in all soil samples obtained by ICP-MS using concentrated nitric acid had acceptableagreement with INAA results. The measured concentrations of Ce, La, Nd, Sc, U and Th in the soil samples ranged within 260-461, 153-922, 87-632, 10-16, 33-134 and 156-323 mg/kg, respectively. |
