AI Article Synopsis
- HPIC was combined with SF-ICP-MS to effectively separate and quantify plutonium, uranium, neodymium, and gadolinium from similar nuclides, achieving high sensitivity.
- The separation utilized mixed bed ion exchange columns and involved elution with nitric acid for Pu and U, followed by a gradient of oxalic acid for lanthanides.
- The method showed good repeatability and accuracy, comparable to TIMS, while improving sample processing speed and reducing radiation exposure for the operator.
Article Abstract
High-pressure ion chromatography (HPIC) was coupled with sector field inductively coupled plasma-mass spectrometry (SF-ICP-MS) to separate plutonium (Pu), uranium (U), neodymium (Nd) and gadolinium (Gd) nuclides from isobaric nuclides and to quantify them with high sensitivity. In this study, mixed bed ion exchange columns CG5A and CS5A were used, from which Pu and U were eluted first using 1 M nitric acid. The lanthanides were then separated using a gradient of 0.1-0.15 M oxalic acid with the pH adjusted to 4.5. The HPIC-SF-ICP-MS method was validated using different sample matrices, i.e. spent nuclear fuel and soil. The method was found to be repeatable and gave rise to transient signals suitable for quantification of nuclide-specific concentrations using external calibration. In terms of accuracy, the HPIC-SF-ICP-MS measurement results were in good agreement with those obtained using thermal ionization mass spectrometry (TIMS). Finally, the method provides an improvement in sample throughput (≤60 minutes per sample) and reduces exposure of the operator to radiation compared to off-line gravitational chromatography followed by TIMS.
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| http://dx.doi.org/10.1016/j.chroma.2019.460839 | DOI Listing |
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